# Kernel Selection doesn't work **URL:** \ **Category:** Bug Reports\ **Created:** [November 3, 2025, 3:04pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796 "2025-11-03T15:04:34Z")\ **Posts on this page:** 20\ **Page:** 2
**Author:** ![Nguyen\_Thien](https://avatars.discourse-cdn.com/v4/letter/n/a587f6/32.png) [@Nguyen\_Thien](https://forum.cursor.com/u/Nguyen_Thien)\ **Post date:** [November 4, 2025, 12:42pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/23 "2025-11-04T12:42:02Z")
same 😃 ---
**Author:** ![Lukas\_Kilian\_Hermann](https://avatars.discourse-cdn.com/v4/letter/l/9e8a1a/32.png) [@Lukas\_Kilian\_Hermann](https://forum.cursor.com/u/Lukas_Kilian_Hermann)\ **Post date:** [November 4, 2025, 11:09am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/24 "2025-11-04T11:09:11Z")
### Where does the bug appear (feature/product)? Cursor IDE ### Describe the Bug Right before pressing install update my interactive jupyter notebook (ctrl + shift + enter) worked fine. Now it’s throwing a: /c:/Users/Lukas/AppData/Roaming/Cursor/User/globalStorage/ms-toolsai.jupyter/version-2025.2.0/jupyter/runtime contains invalid WIN32 path characters. What I’ve tried - Restarting Cursor - Deleting venv and recreating - Downgrading the jupyter extension to 2025.2.0 ### Steps to Reproduce Download jupter extension from ms-toolsai. Activate interactive window in settings. Open an interactive window ### Operating System Windows 10/11 ### Current Cursor Version (Menu → About Cursor → Copy) Version: 2.0.54 Windows ### Does this stop you from using Cursor No - Cursor works, but with this issue ---
**Author:** ![Ha\_Nguyen](https://avatars.discourse-cdn.com/v4/letter/h/54ee81/32.png) [@Ha\_Nguyen](https://forum.cursor.com/u/Ha_Nguyen)\ **Post date:** [November 4, 2025, 1:08pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/25 "2025-11-04T13:08:10Z")
I got the same issue and spent the whole day uninstall - reinstall again and again, it doesn’t work, I’m frustrating now. Maybe I’ll try downgrade it tmr ---
**Author:** ![Radek\_Muhlfeit](https://avatars.discourse-cdn.com/v4/letter/r/dbc845/32.png) [@Radek\_Muhlfeit](https://forum.cursor.com/u/Radek_Muhlfeit)\ **Post date:** [November 4, 2025, 4:08pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/26 "2025-11-04T16:08:33Z")
I’ve been forced to downgrade cursor by this too. ---
**Author:** ![Lenakeiz\_88](https://avatars.discourse-cdn.com/v4/letter/l/a3d4f5/32.png) [@Lenakeiz\_88](https://forum.cursor.com/u/Lenakeiz_88)\ **Post date:** [November 4, 2025, 4:42pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/27 "2025-11-04T16:42:58Z")
Same issue, so trying to bump the thread ---
**Author:** ![Eddie\_Deane](https://avatars.discourse-cdn.com/v4/letter/e/e495f1/32.png) [@Eddie\_Deane](https://forum.cursor.com/u/Eddie_Deane)\ **Post date:** [November 4, 2025, 5:03pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/28 "2025-11-04T17:03:19Z")
Same issue, reinstalling to see if that works… ---
**Author:** ![Svilen\_Kolev](https://avatars.discourse-cdn.com/v4/letter/s/90ced4/32.png) [@Svilen\_Kolev](https://forum.cursor.com/u/Svilen_Kolev)\ **Post date:** [November 4, 2025, 7:02pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/29 "2025-11-04T19:02:00Z")
same ---
**Author:** ![zdream](https://avatars.discourse-cdn.com/v4/letter/z/9fc29f/32.png) [@zdream](https://forum.cursor.com/u/zdream)\ **Post date:** [November 4, 2025, 7:05pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/30 "2025-11-04T19:05:32Z")
same. switching over to VSCode for now. ---
**Author:** ![victoremanuel](https://avatars.discourse-cdn.com/v4/letter/v/bc79bd/32.png) [@victoremanuel](https://forum.cursor.com/u/victoremanuel)\ **Post date:** [November 4, 2025, 7:51pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/31 "2025-11-04T19:51:04Z")
same ---
**Author:** ![EstherXSD](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/estherxsd/32/59266_2.png) [@EstherXSD](https://forum.cursor.com/u/EstherXSD)\ **Post date:** [November 4, 2025, 8:09pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/32 "2025-11-04T20:09:03Z")
Same!!! I changed back to VStudio ---
**Author:** ![Babs1337](https://avatars.discourse-cdn.com/v4/letter/b/7bcc69/32.png) [@Babs1337](https://forum.cursor.com/u/Babs1337)\ **Post date:** [November 4, 2025, 8:53pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/34 "2025-11-04T20:53:49Z")
Same issue, plz fix asap ---
**Author:** ![wingray](https://avatars.discourse-cdn.com/v4/letter/w/f475e1/32.png) [@wingray](https://forum.cursor.com/u/wingray)\ **Post date:** [November 5, 2025, 1:16am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/35 "2025-11-05T01:16:24Z")
So bad auto update, jupyter core not work, run by cell cannot be accessed now. ---
**Author:** ![Arjen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@Arjen](https://forum.cursor.com/u/Arjen)\ **Post date:** [November 5, 2025, 1:55am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/36 "2025-11-05T01:55:25Z")
Same issue here … spend a lot of time trying to fix it as I thought it was something I had done, but should have looked here to find out immediately the later version of cursor seem to cause the issue. ---
**Author:** ![Arjen](https://avatars.discourse-cdn.com/v4/letter/a/b9bd4f/32.png) [@Arjen](https://forum.cursor.com/u/Arjen)\ **Post date:** [November 5, 2025, 2:00am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/37 "2025-11-05T02:00:51Z")
Downgrading to the previous version fixed the issue … ---
**Author:** ![rizaldi\_yanuar](https://avatars.discourse-cdn.com/v4/letter/r/58f4c7/32.png) [@rizaldi\_yanuar](https://forum.cursor.com/u/rizaldi_yanuar)\ **Post date:** [November 5, 2025, 4:27am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/38 "2025-11-05T04:27:34Z")
same. but my current walkaround just install the previous version 1.7 all the extension are same as before and jupyter works fine but my colleagues are not facing the same problems as us. that’s a bit strange ---
**Author:** ![jrjrjrjr123](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/jrjrjrjr123/32/85977_2.png) [@jrjrjrjr123](https://forum.cursor.com/u/jrjrjrjr123)\ **Post date:** [November 5, 2025, 4:32am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/39 "2025-11-05T04:32:26Z")
I have the same problem,too. ---
**Author:** ![antonkarlovskiy](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/antonkarlovskiy/32/85982_2.png) [@antonkarlovskiy](https://forum.cursor.com/u/antonkarlovskiy)\ **Post date:** [November 5, 2025, 5:35am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/40 "2025-11-05T05:35:00Z")
I have the same problem. I cannot select any of my Kernels. ---
**Author:** ![MrVocabulary](https://avatars.discourse-cdn.com/v4/letter/m/85e7bf/32.png) [@MrVocabulary](https://forum.cursor.com/u/MrVocabulary)\ **Post date:** [November 4, 2025, 8:18pm UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/41 "2025-11-04T20:18:42Z")
### Where does the bug appear (feature/product)? Cursor IDE ### Describe the Bug Sinde today’s update (Nov 4th, 2025) whenever I use Jupyter notebook, I cannot select any kernel: it lists available environments, just selecting them does nothing. tl;dr it worked 5 minutes before update. It still works on VS Code, so it seems to be Cursor-specific. ### Steps to Reproduce 1. Open a notebook 2. Click “Select kernel” 3. Click on any kernel ### Expected Behavior Kernel selected so that I can run the notebook. ### Operating System Windows 10/11 ### Current Cursor Version (Menu → About Cursor → Copy) Version: 2.0.54 (system setup) VSCode Version: 1.99.3 Commit: 7a31bffd467aa2d9adfda69076eb924e9062cb20 Date: 2025-11-03T22:40:44.657Z Electron: 37.7.0 Chromium: 138.0.7204.251 Node.js: 22.20.0 V8: 13.8.258.32-electron.0 OS: Windows\_NT x64 10.0.26100 ### Does this stop you from using Cursor No - Cursor works, but with this issue ---
**Author:** ![zzzongzii](https://avatars.discourse-cdn.com/v4/letter/z/ed8c4c/32.png) [@zzzongzii](https://forum.cursor.com/u/zzzongzii)\ **Post date:** [November 5, 2025, 7:44am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/42 "2025-11-05T07:44:17Z")
version 2.0.60 still has this problem??? What have you updated? ---
**Author:** ![jdejones](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/jdejones/32/85997_2.png) [@jdejones](https://forum.cursor.com/u/jdejones)\ **Post date:** [November 5, 2025, 8:13am UTC](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796/43 "2025-11-05T08:13:06Z")
It’s not working for me either. [Previous page](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796.md?page=1) [Next page](https://forum.cursor.com/t/kernel-selection-doesnt-work/140796.md?page=3)