[GH-ISSUE #1345] [Bug]: Python packages that are required to run ComfyUI are not installed - ComfyUI Setup 0.4.74 - x64 #375

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opened 2026-10-31 22:12:12 +00:00 by bsakaguchi · 5 comments

bsakaguchi commented 2026-10-31 22:12:12 +00:00

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Originally created by @qlxxkj on GitHub (Sep 25, 2025).
Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1345

App Version

upgrade lasted version 0.4.74 - x64

tips:
Install python packages
Python packages that are required to run ComfyUI are not installed.

whateve click next or install ,it could`t launch.

Expected Behavior

after upgrade it auto launch

Actual Behavior

whateve click next or install ,it could`t launch.

Steps to Reproduce

1. The software prompts that the latest version is available and asks if I want to update immediately.
2. I click Update Now.
3. After the update is complete, it starts normally.
4. During the image generation process, it prompts that the network connection failed.
5. I close the software and restart it, but it says "Cannot find Python package."

Debug Logs

当你运行一个故障排除命令时，任何输出都会在这里显示。Windows PowerShell
版权所有（C） Microsoft Corporation。保留所有权利。

安装最新的 PowerShell，了解新功能和改进！https://aka.ms/PSWindows

PS D:\ComfyUI> & "C:\Program Files\ComfyUI\resources\uv\win\uv.exe" "venv" "--python" "3.12" "--python-preference" "only-managed"
error: Failed to download https://github.com/astral-sh/python-build-standalone/releases/download/20250818/cpython-3.12.11%2B20250818-x86_64-pc-windows-msvc-install_only_stripped.tar.gz
  Caused by: Request failed after 3 retries
  Caused by: error sending request for url (https://github.com/astral-sh/python-build-standalone/releases/download/20250818/cpython-3.12.11%2B20250818-x86_64-pc-windows-msvc-install_only_stripped.tar.gz)
  Caused by: client error (Connect)
  Caused by: tunnel error: failed to create underlying connection
  Caused by: tcp connect error
  Caused by: 由于目标计算机积极拒绝，无法连接。 (os error 10061)
PS D:\ComfyUI> echo "_-end-1758774210729:$?"
_-end-1758774210729:False

Browser Logs

none

Settings JSON

{
"Comfy-Desktop.AutoUpdate": true,
"Comfy-Desktop.SendStatistics": true,
"Comfy.ColorPalette": "dark",
"Comfy.UseNewMenu": "Top",
"Comfy.Workflow.WorkflowTabsPosition": "Topbar",
"Comfy.Workflow.ShowMissingModelsWarning": true,
"Comfy.Server.LaunchArgs": {
"listen": "0.0.0.0"
},
"AGL.Locale": "zh-CN",
"Comfy.Server.ServerConfigValues": {
"listen": "0.0.0.0"
},
"Comfy.TutorialCompleted": true,
"Comfy.CustomColorPalettes": {
"obsidian": {
"version": 111,
"id": "obsidian",
"name": "Obsidian",
"colors": {
"node_slot": {
"CLIP": "#FFD500",
"CLIP_VISION": "#A8DADC",
"CLIP_VISION_OUTPUT": "#ad7452",
"CONDITIONING": "#FFA931",
"CONTROL_NET": "#6EE7B7",
"IMAGE": "#64B5F6",
"LATENT": "#FF9CF9",
"MASK": "#81C784",
"MODEL": "#B39DDB",
"STYLE_MODEL": "#C2FFAE",
"VAE": "#FF6E6E",
"TAESD": "#DCC274",
"PIPE_LINE": "#7737AA",
"PIPE_LINE_SDXL": "#7737AA",
"INT": "#29699C",
"X_Y": "#38291f",
"XYPLOT": "#74DA5D",
"LORA_STACK": "#94dccd",
"CONTROL_NET_STACK": "#94dccd",
"FAST_MODEL_LOADER": "#ffd399",
"SAMPLING": "#60a5fa"
},
"litegraph_base": {
"BACKGROUND_IMAGE": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAQBJREFUeNrs1rEKwjAUhlETUkj3vP9rdmr1Ysammk2w5wdxuLgcMHyptfawuZX4pJSWZTnfnu/lnIe/jNNxHHGNn//HNbbv+4dr6V+11uF527arU7+u63qfa/bnmh8sWLBgwYJlqRf8MEptXPBXJXa37BSl3ixYsGDBMliwFLyCV/DeLIMFCxYsWLBMwSt4Be/NggXLYMGCBUvBK3iNruC9WbBgwYJlsGApeAWv4L1ZBgsWLFiwYJmCV/AK3psFC5bBggULloJX8BpdwXuzYMGCBctgwVLwCl7Be7MMFixYsGDBsu8FH1FaSmExVfAxBa/gvVmwYMGCZbBg/W4vAQYA5tRF9QYlv/QAAAAASUVORK5CYII=",
"CLEAR_BACKGROUND_COLOR": "#222222",
"NODE_TITLE_COLOR": "#d4d4d8",
"NODE_SELECTED_TITLE_COLOR": "#ffffff",
"NODE_TEXT_SIZE": 14,
"NODE_TEXT_COLOR": "#ffffff",
"NODE_SUBTEXT_SIZE": 12,
"NODE_DEFAULT_COLOR": "#09090b",
"NODE_DEFAULT_BGCOLOR": "rgba(24,24,27,.9)",
"NODE_DEFAULT_BOXCOLOR": "rgba(255,255,255,.75)",
"NODE_DEFAULT_SHAPE": 2,
"NODE_BOX_OUTLINE_COLOR": "#60a5fa",
"DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0)",
"DEFAULT_GROUP_FONT": 24,
"WIDGET_BGCOLOR": "#242427",
"WIDGET_OUTLINE_COLOR": "#3f3f46",
"WIDGET_TEXT_COLOR": "#d4d4d8",
"WIDGET_SECONDARY_TEXT_COLOR": "#d4d4d8",
"LINK_COLOR": "#9A9",
"EVENT_LINK_COLOR": "#A86",
"CONNECTING_LINK_COLOR": "#AFA"
},
"comfy_base": {
"fg-color": "#fff",
"bg-color": "#09090b",
"comfy-menu-bg": "rgba(24,24,24,.9)",
"comfy-input-bg": "#262626",
"input-text": "#ddd",
"descrip-text": "#999",
"drag-text": "#ccc",
"error-text": "#ff4444",
"border-color": "#29292c",
"tr-even-bg-color": "rgba(28,28,28,.9)",
"tr-odd-bg-color": "rgba(19,19,19,.9)"
}
}
},
"obsidian_dark": {
"version": 111,
"id": "obsidian_dark",
"name": "Obsidian Dark",
"colors": {
"node_slot": {
"CLIP": "#FFD500",
"CLIP_VISION": "#A8DADC",
"CLIP_VISION_OUTPUT": "#ad7452",
"CONDITIONING": "#FFA931",
"CONTROL_NET": "#6EE7B7",
"IMAGE": "#64B5F6",
"LATENT": "#FF9CF9",
"MASK": "#81C784",
"MODEL": "#B39DDB",
"STYLE_MODEL": "#C2FFAE",
"VAE": "#FF6E6E",
"TAESD": "#DCC274",
"PIPE_LINE": "#7737AA",
"PIPE_LINE_SDXL": "#7737AA",
"INT": "#29699C",
"X_Y": "#38291f",
"XYPLOT": "#74DA5D",
"LORA_STACK": "#94dccd",
"CONTROL_NET_STACK": "#94dccd",
"FAST_MODEL_LOADER": "#ffd399",
"SAMPLING": "#60a5fa"
},
"litegraph_base": {
"BACKGROUND_IMAGE": "data:image/png;base64,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",
"CLEAR_BACKGROUND_COLOR": "#09090b",
"NODE_TITLE_COLOR": "#d4d4d8",
"NODE_SELECTED_TITLE_COLOR": "#ffffff",
"NODE_TEXT_SIZE": 14,
"NODE_TEXT_COLOR": "#ffffff",
"NODE_SUBTEXT_SIZE": 12,
"NODE_DEFAULT_COLOR": "#09090b",
"NODE_DEFAULT_BGCOLOR": "rgba(24,24,27,.9)",
"NODE_DEFAULT_BOXCOLOR": "rgba(255,255,255,.75)",
"NODE_DEFAULT_SHAPE": 2,
"NODE_BOX_OUTLINE_COLOR": "#60a5fa",
"DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0)",
"DEFAULT_GROUP_FONT": 24,
"WIDGET_BGCOLOR": "#242427",
"WIDGET_OUTLINE_COLOR": "#3f3f46",
"WIDGET_TEXT_COLOR": "#d4d4d8",
"WIDGET_SECONDARY_TEXT_COLOR": "#d4d4d8",
"LINK_COLOR": "#9A9",
"EVENT_LINK_COLOR": "#A86",
"CONNECTING_LINK_COLOR": "#AFA"
},
"comfy_base": {
"fg-color": "#fff",
"bg-color": "#09090b",
"comfy-menu-bg": "rgba(24,24,24,.9)",
"comfy-input-bg": "#262626",
"input-text": "#ddd",
"descrip-text": "#999",
"drag-text": "#ccc",
"error-text": "#ff4444",
"border-color": "#29292c",
"tr-even-bg-color": "rgba(28,28,28,.9)",
"tr-odd-bg-color": "rgba(19,19,19,.9)"
}
}
},
"milk_white": {
"id": "milk_white",
"name": "Milk White",
"colors": {
"node_slot": {
"CLIP": "#FFA726",
"CLIP_VISION": "#5C6BC0",
"CLIP_VISION_OUTPUT": "#8D6E63",
"CONDITIONING": "#EF5350",
"CONTROL_NET": "#66BB6A",
"IMAGE": "#42A5F5",
"LATENT": "#AB47BC",
"MASK": "#9CCC65",
"MODEL": "#7E57C2",
"STYLE_MODEL": "#D4E157",
"VAE": "#FF7043",
"PIPE_LINE": "#7737AA",
"PIPE_LINE_SDXL": "#7737AA",
"INT": "#29699C",
"X_Y": "#38291f",
"XYPLOT": "#74DA5D",
"LORA_STACK": "#94dccd",
"CONTROL_NET_STACK": "#94dccd",
"FAST_MODEL_LOADER": "#ffd399",
"SAMPLING": "#60a5fa"
},
"litegraph_base": {
"BACKGROUND_IMAGE": "data:image/gif;base64,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",
"CLEAR_BACKGROUND_COLOR": "lightgray",
"NODE_TITLE_COLOR": "#222",
"NODE_SELECTED_TITLE_COLOR": "#000",
"NODE_TEXT_SIZE": 14,
"NODE_TEXT_COLOR": "#444",
"NODE_SUBTEXT_SIZE": 12,
"NODE_DEFAULT_COLOR": "#F7F7F7",
"NODE_DEFAULT_BGCOLOR": "#F5F5F5",
"NODE_DEFAULT_BOXCOLOR": "#555",
"NODE_DEFAULT_SHAPE": 2,
"NODE_BOX_OUTLINE_COLOR": "#000",
"DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0.1)",
"DEFAULT_GROUP_FONT": 24,
"WIDGET_BGCOLOR": "#D4D4D4",
"WIDGET_OUTLINE_COLOR": "#999",
"WIDGET_TEXT_COLOR": "#222",
"WIDGET_SECONDARY_TEXT_COLOR": "#555",
"LINK_COLOR": "#9A9",
"EVENT_LINK_COLOR": "#FF9800",
"CONNECTING_LINK_COLOR": "#222"
},
"comfy_base": {
"fg-color": "#222",
"bg-color": "#DDD",
"comfy-menu-bg": "#F5F5F5",
"comfy-input-bg": "#C9C9C9",
"input-text": "#222",
"descrip-text": "#444",
"drag-text": "#555",
"error-text": "#F44336",
"border-color": "#bbb",
"tr-even-bg-color": "#f9f9f9",
"tr-odd-bg-color": "#fff",
"content-bg": "#e0e0e0",
"content-fg": "#222",
"content-hover-bg": "#adadad",
"content-hover-fg": "#222"
}
}
}
},
"Comfy.Queue.ImageFit": "contain",
"Comfy.Release.Version": "0.3.59",
"Comfy.Release.Status": "what's new seen",
"Comfy.Release.Timestamp": 1757658843429,
"Comfy.Minimap.Visible": false,
"Comfy.DevMode": true
}

Other

No response

┆Issue is synchronized with this Notion page by Unito

Originally created by @qlxxkj on GitHub (Sep 25, 2025). Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1345 ### App Version upgrade lasted version 0.4.74 - x64 tips: Install python packages Python packages that are required to run ComfyUI are not installed. whateve click next or install ,it could`t launch. <img width="1295" height="754" alt="Image" src="https://github.com/user-attachments/assets/5913bc5a-be17-4e71-9918-270ffbe4e5e5" /> ### Expected Behavior after upgrade it auto launch ### Actual Behavior whateve click next or install ,it could`t launch. ### Steps to Reproduce 1. The software prompts that the latest version is available and asks if I want to update immediately. 2. I click Update Now. 3. After the update is complete, it starts normally. 4. During the image generation process, it prompts that the network connection failed. 5. I close the software and restart it, but it says "Cannot find Python package." ### Debug Logs ```powershell 当你运行一个故障排除命令时，任何输出都会在这里显示。Windows PowerShell 版权所有（C） Microsoft Corporation。保留所有权利。 安装最新的 PowerShell，了解新功能和改进！https://aka.ms/PSWindows PS D:\ComfyUI> & "C:\Program Files\ComfyUI\resources\uv\win\uv.exe" "venv" "--python" "3.12" "--python-preference" "only-managed" error: Failed to download https://github.com/astral-sh/python-build-standalone/releases/download/20250818/cpython-3.12.11%2B20250818-x86_64-pc-windows-msvc-install_only_stripped.tar.gz Caused by: Request failed after 3 retries Caused by: error sending request for url (https://github.com/astral-sh/python-build-standalone/releases/download/20250818/cpython-3.12.11%2B20250818-x86_64-pc-windows-msvc-install_only_stripped.tar.gz) Caused by: client error (Connect) Caused by: tunnel error: failed to create underlying connection Caused by: tcp connect error Caused by: 由于目标计算机积极拒绝，无法连接。 (os error 10061) PS D:\ComfyUI> echo "_-end-1758774210729:$?" _-end-1758774210729:False ``` ### Browser Logs none ### Settings JSON { "Comfy-Desktop.AutoUpdate": true, "Comfy-Desktop.SendStatistics": true, "Comfy.ColorPalette": "dark", "Comfy.UseNewMenu": "Top", "Comfy.Workflow.WorkflowTabsPosition": "Topbar", "Comfy.Workflow.ShowMissingModelsWarning": true, "Comfy.Server.LaunchArgs": { "listen": "0.0.0.0" }, "AGL.Locale": "zh-CN", "Comfy.Server.ServerConfigValues": { "listen": "0.0.0.0" }, "Comfy.TutorialCompleted": true, "Comfy.CustomColorPalettes": { "obsidian": { "version": 111, "id": "obsidian", "name": "Obsidian", "colors": { "node_slot": { "CLIP": "#FFD500", "CLIP_VISION": "#A8DADC", "CLIP_VISION_OUTPUT": "#ad7452", "CONDITIONING": "#FFA931", "CONTROL_NET": "#6EE7B7", "IMAGE": "#64B5F6", "LATENT": "#FF9CF9", "MASK": "#81C784", "MODEL": "#B39DDB", "STYLE_MODEL": "#C2FFAE", "VAE": "#FF6E6E", "TAESD": "#DCC274", "PIPE_LINE": "#7737AA", "PIPE_LINE_SDXL": "#7737AA", "INT": "#29699C", "X_Y": "#38291f", "XYPLOT": "#74DA5D", "LORA_STACK": "#94dccd", "CONTROL_NET_STACK": "#94dccd", "FAST_MODEL_LOADER": "#ffd399", "SAMPLING": "#60a5fa" }, "litegraph_base": { "BACKGROUND_IMAGE": "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAIAAAD/gAIDAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAQBJREFUeNrs1rEKwjAUhlETUkj3vP9rdmr1Ysammk2w5wdxuLgcMHyptfawuZX4pJSWZTnfnu/lnIe/jNNxHHGNn//HNbbv+4dr6V+11uF527arU7+u63qfa/bnmh8sWLBgwYJlqRf8MEptXPBXJXa37BSl3ixYsGDBMliwFLyCV/DeLIMFCxYsWLBMwSt4Be/NggXLYMGCBUvBK3iNruC9WbBgwYJlsGApeAWv4L1ZBgsWLFiwYJmCV/AK3psFC5bBggULloJX8BpdwXuzYMGCBctgwVLwCl7Be7MMFixYsGDBsu8FH1FaSmExVfAxBa/gvVmwYMGCZbBg/W4vAQYA5tRF9QYlv/QAAAAASUVORK5CYII=", "CLEAR_BACKGROUND_COLOR": "#222222", "NODE_TITLE_COLOR": "#d4d4d8", "NODE_SELECTED_TITLE_COLOR": "#ffffff", "NODE_TEXT_SIZE": 14, "NODE_TEXT_COLOR": "#ffffff", "NODE_SUBTEXT_SIZE": 12, "NODE_DEFAULT_COLOR": "#09090b", "NODE_DEFAULT_BGCOLOR": "rgba(24,24,27,.9)", "NODE_DEFAULT_BOXCOLOR": "rgba(255,255,255,.75)", "NODE_DEFAULT_SHAPE": 2, "NODE_BOX_OUTLINE_COLOR": "#60a5fa", "DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0)", "DEFAULT_GROUP_FONT": 24, "WIDGET_BGCOLOR": "#242427", "WIDGET_OUTLINE_COLOR": "#3f3f46", "WIDGET_TEXT_COLOR": "#d4d4d8", "WIDGET_SECONDARY_TEXT_COLOR": "#d4d4d8", "LINK_COLOR": "#9A9", "EVENT_LINK_COLOR": "#A86", "CONNECTING_LINK_COLOR": "#AFA" }, "comfy_base": { "fg-color": "#fff", "bg-color": "#09090b", "comfy-menu-bg": "rgba(24,24,24,.9)", "comfy-input-bg": "#262626", "input-text": "#ddd", "descrip-text": "#999", "drag-text": "#ccc", "error-text": "#ff4444", "border-color": "#29292c", "tr-even-bg-color": "rgba(28,28,28,.9)", "tr-odd-bg-color": "rgba(19,19,19,.9)" } } }, "obsidian_dark": { "version": 111, "id": "obsidian_dark", "name": "Obsidian Dark", "colors": { "node_slot": { "CLIP": "#FFD500", "CLIP_VISION": "#A8DADC", "CLIP_VISION_OUTPUT": "#ad7452", "CONDITIONING": "#FFA931", "CONTROL_NET": "#6EE7B7", "IMAGE": "#64B5F6", "LATENT": "#FF9CF9", "MASK": "#81C784", "MODEL": "#B39DDB", "STYLE_MODEL": 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"CLEAR_BACKGROUND_COLOR": "#09090b", "NODE_TITLE_COLOR": "#d4d4d8", "NODE_SELECTED_TITLE_COLOR": "#ffffff", "NODE_TEXT_SIZE": 14, "NODE_TEXT_COLOR": "#ffffff", "NODE_SUBTEXT_SIZE": 12, "NODE_DEFAULT_COLOR": "#09090b", "NODE_DEFAULT_BGCOLOR": "rgba(24,24,27,.9)", "NODE_DEFAULT_BOXCOLOR": "rgba(255,255,255,.75)", "NODE_DEFAULT_SHAPE": 2, "NODE_BOX_OUTLINE_COLOR": "#60a5fa", "DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0)", "DEFAULT_GROUP_FONT": 24, "WIDGET_BGCOLOR": "#242427", "WIDGET_OUTLINE_COLOR": "#3f3f46", "WIDGET_TEXT_COLOR": "#d4d4d8", "WIDGET_SECONDARY_TEXT_COLOR": "#d4d4d8", "LINK_COLOR": "#9A9", "EVENT_LINK_COLOR": "#A86", "CONNECTING_LINK_COLOR": "#AFA" }, "comfy_base": { "fg-color": "#fff", "bg-color": "#09090b", "comfy-menu-bg": "rgba(24,24,24,.9)", "comfy-input-bg": "#262626", "input-text": "#ddd", "descrip-text": "#999", "drag-text": "#ccc", "error-text": "#ff4444", "border-color": "#29292c", "tr-even-bg-color": "rgba(28,28,28,.9)", "tr-odd-bg-color": "rgba(19,19,19,.9)" } } }, "milk_white": { "id": "milk_white", "name": "Milk White", "colors": { "node_slot": { "CLIP": "#FFA726", "CLIP_VISION": "#5C6BC0", "CLIP_VISION_OUTPUT": "#8D6E63", "CONDITIONING": "#EF5350", "CONTROL_NET": "#66BB6A", "IMAGE": "#42A5F5", "LATENT": "#AB47BC", "MASK": "#9CCC65", "MODEL": "#7E57C2", "STYLE_MODEL": "#D4E157", "VAE": "#FF7043", "PIPE_LINE": "#7737AA", "PIPE_LINE_SDXL": "#7737AA", "INT": "#29699C", "X_Y": "#38291f", "XYPLOT": "#74DA5D", "LORA_STACK": "#94dccd", "CONTROL_NET_STACK": "#94dccd", "FAST_MODEL_LOADER": "#ffd399", "SAMPLING": "#60a5fa" }, "litegraph_base": { "BACKGROUND_IMAGE": 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"NODE_TITLE_COLOR": "#222", "NODE_SELECTED_TITLE_COLOR": "#000", "NODE_TEXT_SIZE": 14, "NODE_TEXT_COLOR": "#444", "NODE_SUBTEXT_SIZE": 12, "NODE_DEFAULT_COLOR": "#F7F7F7", "NODE_DEFAULT_BGCOLOR": "#F5F5F5", "NODE_DEFAULT_BOXCOLOR": "#555", "NODE_DEFAULT_SHAPE": 2, "NODE_BOX_OUTLINE_COLOR": "#000", "DEFAULT_SHADOW_COLOR": "rgba(0,0,0,0.1)", "DEFAULT_GROUP_FONT": 24, "WIDGET_BGCOLOR": "#D4D4D4", "WIDGET_OUTLINE_COLOR": "#999", "WIDGET_TEXT_COLOR": "#222", "WIDGET_SECONDARY_TEXT_COLOR": "#555", "LINK_COLOR": "#9A9", "EVENT_LINK_COLOR": "#FF9800", "CONNECTING_LINK_COLOR": "#222" }, "comfy_base": { "fg-color": "#222", "bg-color": "#DDD", "comfy-menu-bg": "#F5F5F5", "comfy-input-bg": "#C9C9C9", "input-text": "#222", "descrip-text": "#444", "drag-text": "#555", "error-text": "#F44336", "border-color": "#bbb", "tr-even-bg-color": "#f9f9f9", "tr-odd-bg-color": "#fff", "content-bg": "#e0e0e0", "content-fg": "#222", "content-hover-bg": "#adadad", "content-hover-fg": "#222" } } } }, "Comfy.Queue.ImageFit": "contain", "Comfy.Release.Version": "0.3.59", "Comfy.Release.Status": "what's new seen", "Comfy.Release.Timestamp": 1757658843429, "Comfy.Minimap.Visible": false, "Comfy.DevMode": true } ### Other _No response_ ┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-1345-Bug-Python-packages-that-are-required-to-run-ComfyUI-are-not-installed-ComfyUI-Se-2796d73d365081e49b48f0e2a2fdc2b9) by [Unito](https://www.unito.io)

bsakaguchi 2026-10-31 22:12:12 +00:00

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bsakaguchi commented 2026-10-31 22:12:13 +00:00

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@dosubot[bot] commented on GitHub (Sep 25, 2025):

Hi @qlxxkj! I'm Dosu and I’m helping the desktop team.

Your issue is caused by a network failure when the installer tries to download the required Python build from GitHub. This prevents ComfyUI Desktop from setting up its Python environment, so the app can't install or run the necessary packages. This is common in regions with restricted or unstable access to GitHub, such as mainland China, or if a firewall/proxy blocks the connection. The error message “由于目标计算机积极拒绝，无法连接” confirms the connection was refused by the target server [docs].

How to fix:

1. Retry with a different mirror:
   During installation, try to select an alternative Python download mirror. For example, use https://python-standalone.org/mirror/astral-sh/python-build-standalone or a GitHub proxy like https://gh-proxy.com/github.com/astral-sh/python-build-standalone/releases/download if available [docs] [issue].

2. Check your network/proxy:
   Make sure your network allows access to GitHub. If you use a VPN, try switching to a mode that supports direct connections (like TUN mode). Some VPNs or proxies may not work for these downloads [issue].

3. Manual recovery:
   If you’re stuck in a loop, delete the .venv folder in your ComfyUI installation directory and restart the app. This will force the installer to retry the Python environment setup [issue].

4. Manual package installation:
   If the virtual environment exists but is missing packages, open a terminal, activate the venv, and run:

   .venv\Scripts\activate
   python -m pip install -r requirements.txt
   

   This installs the required packages in the correct environment [issue].

5. Use domestic PyPI mirrors:
   For pip, you can use a domestic mirror like Tsinghua:

   pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
   

   This helps if PyPI is slow or blocked [docs].

If you continue to see the maintenance screen after every update, it usually means the Python environment is still not set up correctly, often due to persistent network issues or the mirror setting not being respected during troubleshooting [issue].

You can view logs and terminal output from the maintenance page to get more details about what failed. If you fix the network/mirror issue and retry, the installer should complete and the app should launch normally.

To reply, just mention @dosu.

---

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<!-- gh-comment-id:3332098613 --> @dosubot[bot] commented on GitHub (Sep 25, 2025): <!-- Greeting --> Hi @qlxxkj! I'm [Dosu](https://go.dosu.dev/dosubot) and I’m helping the desktop team. <!-- Answer --> Your issue is caused by a network failure when the installer tries to download the required Python build from GitHub. This prevents ComfyUI Desktop from setting up its Python environment, so the app can't install or run the necessary packages. This is common in regions with restricted or unstable access to GitHub, such as mainland China, or if a firewall/proxy blocks the connection. The error message “由于目标计算机积极拒绝，无法连接” confirms the connection was refused by the target server [[docs](https://docs.comfy.org/installation/desktop/windows)]. **How to fix:** 1. **Retry with a different mirror:** During installation, try to select an alternative Python download mirror. For example, use `https://python-standalone.org/mirror/astral-sh/python-build-standalone` or a GitHub proxy like `https://gh-proxy.com/github.com/astral-sh/python-build-standalone/releases/download` if available [[docs](https://docs.comfy.org/installation/desktop/windows)] [[issue](https://github.com/Comfy-Org/desktop/issues/836)]. 2. **Check your network/proxy:** Make sure your network allows access to GitHub. If you use a VPN, try switching to a mode that supports direct connections (like TUN mode). Some VPNs or proxies may not work for these downloads [[issue](https://github.com/Comfy-Org/desktop/issues/1165)]. 3. **Manual recovery:** If you’re stuck in a loop, delete the `.venv` folder in your ComfyUI installation directory and restart the app. This will force the installer to retry the Python environment setup [[issue](https://github.com/Comfy-Org/desktop/issues/560)]. 4. **Manual package installation:** If the virtual environment exists but is missing packages, open a terminal, activate the venv, and run: ``` .venv\Scripts\activate python -m pip install -r requirements.txt ``` This installs the required packages in the correct environment [[issue](https://github.com/Comfy-Org/desktop/issues/1046)]. 5. **Use domestic PyPI mirrors:** For pip, you can use a domestic mirror like Tsinghua: ``` pip install -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple ``` This helps if PyPI is slow or blocked [[docs](https://docs.comfy.org/installation/update_comfyui)]. If you continue to see the maintenance screen after every update, it usually means the Python environment is still not set up correctly, often due to persistent network issues or the mirror setting not being respected during troubleshooting [[issue](https://github.com/Comfy-Org/desktop/issues/1165)]. You can view logs and terminal output from the maintenance page to get more details about what failed. If you fix the network/mirror issue and retry, the installer should complete and the app should launch normally. <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=reply-with-mention&utm_term=Comfy-Org%2Fdesktop).* --- Share context across your team and agents. Try [Dosu](https://dosu.dev?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=knowledge-infrastructure-tagline&utm_term=Comfy-Org%2Fdesktop). [](https://app.dosu.dev/response-feedback?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=knowledge-infrastructure-feedback&utm_term=Comfy-Org%2Fdesktop#message_id=42abd76a-79d8-4bfd-b7f9-87abab8571f2) [](https://github.dosu.com/Comfy-Org/desktop?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=knowledge-infrastructure-learn-repo&utm_term=Comfy-Org%2Fdesktop) [](https://app.dosu.dev/signup?referrer=openSource&source=github-footer&utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=knowledge-infrastructure-add-team&utm_term=Comfy-Org%2Fdesktop)

bsakaguchi commented 2026-10-31 22:12:13 +00:00

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@qlxxkj commented on GitHub (Sep 25, 2025):

I have fixed it

<!-- gh-comment-id:3332630371 --> @qlxxkj commented on GitHub (Sep 25, 2025): I have fixed it

bsakaguchi commented 2026-10-31 22:12:13 +00:00

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@webfiltered commented on GitHub (Sep 25, 2025):

I have fixed it

Great news! Happy to close this off, but if you're able to, please do let us know what the issue was / how you resolved it. We'd really like to ensure this does not happen to more people.

<!-- gh-comment-id:3336101422 --> @webfiltered commented on GitHub (Sep 25, 2025): > I have fixed it Great news! Happy to close this off, but if you're able to, please do let us know what the issue was / how you resolved it. We'd really like to ensure this does not happen to more people.

bsakaguchi commented 2026-10-31 22:12:13 +00:00

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@qlxxkj commented on GitHub (Sep 26, 2025):

Due to network problems in mainland China, the python installation package mirror cannot be downloaded. During the installation process, I saw an error in the mirror according to the prompt. I refreshed the mirror address again until a check mark appeared, and then installed it normally.

<!-- gh-comment-id:3336446374 --> @qlxxkj commented on GitHub (Sep 26, 2025): Due to network problems in mainland China, the python installation package mirror cannot be downloaded. During the installation process, I saw an error in the mirror according to the prompt. I refreshed the mirror address again until a check mark appeared, and then installed it normally.

bsakaguchi commented 2026-10-31 22:12:13 +00:00

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@webfiltered commented on GitHub (Sep 26, 2025):

Thank you for letting us know! Hopefully we can find some way to smooth this whole experience - will keep it in mind.

<!-- gh-comment-id:3336540771 --> @webfiltered commented on GitHub (Sep 26, 2025): Thank you for letting us know! Hopefully we can find some way to smooth this whole experience - will keep it in mind.

bsakaguchi referenced this issue 2026-10-31 22:17:17 +00:00

[PR #375] [MERGED] v0.3.18 #831

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