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[GH-ISSUE #1393] [Bug]: Not starting after updating nodes #388

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opened 2026-10-31 22:12:24 +00:00 by bsakaguchi · 1 comment

bsakaguchi commented

2026-10-31 22:12:24 +00:00

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Originally created by @Alienizering on GitHub (Oct 31, 2025).
Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1393

App Version

I'm on Windows 10 and when I update the nodes via the Manager and restart, the UI doesn't show (the window is visible) and two python service starts in task manager (downloading? as the network activity is going), I have to kill them once they no longer "download", close ComfyUI and restart it.

Expected Behavior

start normally.

Actual Behavior

Window shows but no UI is displayed.

Steps to Reproduce

Do a node update in the Manager and restart.

Debug Logs

Browser Logs

No response

Settings JSON

No response

Other

No response

┆Issue is synchronized with this Notion page by Unito

Originally created by @Alienizering on GitHub (Oct 31, 2025). Original GitHub issue: https://github.com/Comfy-Org/desktop/issues/1393 ### App Version I'm on Windows 10 and when I update the nodes via the Manager and restart, the UI doesn't show (the window is visible) and two python service starts in task manager (downloading? as the network activity is going), I have to kill them once they no longer "download", close ComfyUI and restart it. ### Expected Behavior start normally. ### Actual Behavior Window shows but no UI is displayed. ### Steps to Reproduce Do a node update in the Manager and restart. ### Debug Logs ```powershell ``` ### Browser Logs _No response_ ### Settings JSON _No response_ ### Other _No response_ ┆Issue is synchronized with this [Notion page](https://www.notion.so/Issue-1393-Bug-Not-starting-after-updating-nodes-29d6d73d3650814da1b1c400d67fb6d8) by [Unito](https://www.unito.io)

bsakaguchi

2026-10-31 22:12:24 +00:00

closed this issue
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bsakaguchi commented

2026-10-31 22:12:25 +00:00

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@dosubot[bot] commented on GitHub (Oct 31, 2025):

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

This is a known issue with the ComfyUI desktop app on Windows, especially after updating nodes via the Manager and restarting. The blank UI and lingering Python processes are often caused by conflicts with custom nodes, dependency problems, or the Manager not updating the user environment correctly in the desktop app. If a workflow with missing or problematic nodes is open during the update, it can also trigger this behavior example.

Troubleshooting steps that have helped others include: disabling custom nodes, resetting the virtual environment by deleting the .venv folder, clearing or regenerating config files, and performing a clean reinstall of the desktop app details. Dependency conflicts (like with huggingface-hub) or missing Python packages after node updates can also cause startup failures; reinstalling dependencies via pip has resolved issues for some users details.

Check the logs (main.log and comfyui.log) in C:\Users\<YOUR_USERNAME>\AppData\Roaming\ComfyUI\logs for errors about node import failures or dependency issues docs. If the issue persists, try disabling custom nodes, resetting the environment, or reinstalling dependencies as described above. If you have a workflow that always loads on startup, try removing or renaming it outside the app to see if the UI recovers example.

Let me know if you need more detailed steps for any of these troubleshooting actions.

To reply, just mention @dosu.

Docs are dead. Just use Dosu.

@dosubot[bot] commented on GitHub (Oct 31, 2025):  Hi @Alienizering! I'm [Dosu](https://go.dosu.dev/dosubot) and I’m helping the desktop team.  This is a known issue with the ComfyUI desktop app on Windows, especially after updating nodes via the Manager and restarting. The blank UI and lingering Python processes are often caused by conflicts with custom nodes, dependency problems, or the Manager not updating the user environment correctly in the desktop app. If a workflow with missing or problematic nodes is open during the update, it can also trigger this behavior [example](https://github.com/Comfy-Org/desktop/issues/688). Troubleshooting steps that have helped others include: disabling custom nodes, resetting the virtual environment by deleting the `.venv` folder, clearing or regenerating config files, and performing a clean reinstall of the desktop app [details](https://github.com/Comfy-Org/desktop/issues/1216). Dependency conflicts (like with `huggingface-hub`) or missing Python packages after node updates can also cause startup failures; reinstalling dependencies via pip has resolved issues for some users [details](https://github.com/Comfy-Org/desktop/issues/1049). Check the logs (`main.log` and `comfyui.log`) in `C:\Users\<YOUR_USERNAME>\AppData\Roaming\ComfyUI\logs` for errors about node import failures or dependency issues [docs](https://docs.comfy.org/installation/desktop/windows). If the issue persists, try disabling custom nodes, resetting the environment, or reinstalling dependencies as described above. If you have a workflow that always loads on startup, try removing or renaming it outside the app to see if the UI recovers [example](https://github.com/Comfy-Org/desktop/issues/688). Let me know if you need more detailed steps for any of these troubleshooting actions.  *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).* --- Docs are dead. Just use [Dosu](https://dosu.dev?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=static-docs-tagline&utm_term=Comfy-Org%2Fdesktop). 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