# Secondary Sidebar not supported **URL:** \ **Category:** Bug Reports\ **Tags:** layout, extensions\ **Created:** [January 14, 2026, 1:39am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827 "2026-01-14T01:39:47Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![kmtr](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/kmtr/32/78207_2.png) [@kmtr](https://forum.cursor.com/u/kmtr)\ **Post date:** [January 14, 2026, 1:39am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/1 "2026-01-14T01:39:47Z")
### Where does the bug appear (feature/product)? Cursor IDE ### Describe the Bug When I was using extensions from the right-hand sidebar in Cursor, I started seeing the following error. ```auto Secondary Sidebar not supported in this version of VSCode. Please update your VSCode to use. Opening in Activity Bar instead. ``` ### Steps to Reproduce Using the Claude Code extension, run the insert command via a keyboard shortcut. ### Operating System MacOS ### Current Cursor Version (Menu → About Cursor → Copy) Version: 2.3.35 VSCode Version: 1.105.1 ### Does this stop you from using Cursor No - Cursor works, but with this issue ---
**Author:** ![deanrie](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/deanrie/32/1263_2.png) [@deanrie](https://forum.cursor.com/u/deanrie)\ **Post date:** [January 14, 2026, 6:19am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/3 "2026-01-14T06:19:09Z")
Hey, thanks for the report. This is a known compatibility issue. Some extensions use the Secondary Sidebar API, which works a bit differently in Cursor compared to vanilla VS Code. As the error message says, Claude Code is automatically opening in the Activity Bar instead of the secondary sidebar. The extension should still work, just in a different place. Can you confirm that Claude Code works fine through the Activity Bar? Or are you seeing any issues with the functionality itself? The team is working on improving VS Code extension compatibility, so Secondary Sidebar support should get better in future versions. ---
**Author:** ![ARajgor](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/arajgor/32/77593_2.png) [@ARajgor](https://forum.cursor.com/u/ARajgor)\ **Post date:** [January 22, 2026, 6:37am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/4 "2026-01-22T06:37:24Z")
As of now, I can’t see anything within the Claude code sidebar extension. And after a restart, the extension is gone. ![image](https://us1.discourse-cdn.com/cursor1/original/3X/4/8/483ede6149a1ae0569ee199a3c57f6d59dd16d45.png) ![image](https://us1.discourse-cdn.com/cursor1/original/3X/b/4/b40b196a4abc4f8a12310283602961d4250ea133.png) ---
**Author:** ![Matt\_Adam](https://avatars.discourse-cdn.com/v4/letter/m/4af34b/32.png) [@Matt\_Adam](https://forum.cursor.com/u/Matt_Adam)\ **Post date:** [February 12, 2026, 11:31pm UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/5 "2026-02-12T23:31:38Z")
It’d be great to fix this. The VSCode model where the secondary sidebar allows docking various agentic extensions is great – it lets me try out a few alternatives when necessary. Extensions that dock by default to the secondary sidebar shouldn’t break like they do now. Please do make this work similarly to VSCode! ---
**Author:** ![AlbertZyc](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/albertzyc/32/99302_2.png) [@AlbertZyc](https://forum.cursor.com/u/AlbertZyc)\ **Post date:** [February 24, 2026, 6:08am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/6 "2026-02-24T06:08:07Z")
Similarly, I also encountered this problem, and it has affected VSCode as well. ---
**Author:** ![bilalyasin1616](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/bilalyasin1616/32/99726_2.png) [@bilalyasin1616](https://forum.cursor.com/u/bilalyasin1616)\ **Post date:** [February 27, 2026, 4:55am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/7 "2026-02-27T04:55:25Z")
+1, this should be fixed. ---
**Author:** ![umberto](https://avatars.discourse-cdn.com/v4/letter/u/e79b87/32.png) [@umberto](https://forum.cursor.com/u/umberto)\ **Post date:** [February 27, 2026, 12:51pm UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/8 "2026-02-27T12:51:55Z")
Totally agree this needs to be fixed. It’s a pity that paid product has such an issue. ---
**Author:** ![Ishan\_Changela](https://avatars.discourse-cdn.com/v4/letter/i/df788c/32.png) [@Ishan\_Changela](https://forum.cursor.com/u/Ishan_Changela)\ **Post date:** [March 5, 2026, 4:27am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/9 "2026-03-05T04:27:10Z")
Facing same issue. this is frustrating. ---
**Author:** ![k00k](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/k00k/32/6529_2.png) [@k00k](https://forum.cursor.com/u/k00k)\ **Post date:** [March 13, 2026, 4:57pm UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/10 "2026-03-13T16:57:13Z")
There’s a workaround here: [Claude Code Side Panel (Chat Panel) Setup Guide](https://forum.cursor.com/t/claude-code-side-panel-chat-panel-setup-guide/136714) But agreed, it should be supported natively. ---
**Author:** ![sohammondal](https://avatars.discourse-cdn.com/v4/letter/s/df788c/32.png) [@sohammondal](https://forum.cursor.com/u/sohammondal)\ **Post date:** [March 17, 2026, 10:19am UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/12 "2026-03-17T10:19:14Z")
Agreed. this should be natively supported ---
**Author:** ![mjnowen](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/mjnowen/32/7815_2.png) [@mjnowen](https://forum.cursor.com/u/mjnowen)\ **Post date:** [March 22, 2026, 3:13pm UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/13 "2026-03-22T15:13:37Z")
+1 please fix this natively ---
**Author:** ![system](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/system/32/99069_2.png) [@system](https://forum.cursor.com/u/system)\ **Post date:** [April 13, 2026, 3:14pm UTC](https://forum.cursor.com/t/secondary-sidebar-not-supported/148827/14 "2026-04-13T15:14:30Z")
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