Cursor tab not work

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

i’m the pro plan , but cursor tab not work ? i see the log show 401 , but i relogin later it’s not work ,why ?

2025-12-16 10:36:52.286 [info] CURSOR LOG: requestId 557a3136-ad04-46b3-899c-9dbdf935f755  
2025-12-16 10:36:52.358 [info] CURSOR LOG: requestId 49a637ec-7e47-451c-9418-fc056a8a5fc3  
2025-12-16 10:36:52.552 [info] CURSOR LOG: Error in streaming cpp (connect error) [canceled] This operation was aborted
2025-12-16 10:36:52.553 [info] CURSOR LOG: Error in streaming cpp (connect error) [canceled] This operation was aborted
2025-12-16 10:36:52.607 [info] CURSOR LOG: requestId 69946d6d-dc52-41c2-a92b-05188d483456  
2025-12-16 10:36:53.505 [info] CURSOR LOG: Done streaming cpp with id 69946d6d-dc52-41c2-a92b-05188d483456
2025-12-16 10:36:53.505 [info] CPP RT LOG: Time taken for streaming cpp 898.1982421875 with request 69946d6d-dc52-41c2-a92b-05188d483456
2025-12-16 10:36:53.505 [info] CPP Request Log with id 69946d6d-dc52-41c2-a92b-05188d483456
2025-12-16 10:36:53.505 [info] =======>Model output 

2025-12-16 10:36:53.505 [info] =======>Debug stream time 12.724748000502586
2025-12-16 10:36:53.505 [info] CURSOR LOG: Error in streaming cpp (connect error) [unauthenticated] HTTP 401
2025-12-16 10:36:53.800 [info] CURSOR LOG: requestId 573e1550-b227-45ba-b013-318e4d3bba5d  
2025-12-16 10:36:54.007 [info] CURSOR LOG: requestId ea34d9b5-c7b0-4e55-90c8-b0a3ea9df983  
2025-12-16 10:36:54.139 [info] CURSOR LOG: requestId cd543525-989f-4359-a363-a7fdd2ead708  
2025-12-16 10:36:54.658 [info] CURSOR LOG: Done streaming cpp with id 573e1550-b227-45ba-b013-318e4d3bba5d
2025-12-16 10:36:54.658 [info] CPP RT LOG: Time taken for streaming cpp 858.302490234375 with request 573e1550-b227-45ba-b013-318e4d3bba5d
2025-12-16 10:36:54.658 [info] CPP Request Log with id 573e1550-b227-45ba-b013-318e4d3bba5d
2025-12-16 10:36:54.658 [info] =======>Model output 

2025-12-16 10:36:54.658 [info] =======>Debug stream time 19.083391000516713
2025-12-16 10:36:54.658 [info] CURSOR LOG: Error in streaming cpp (connect error) [unauthenticated] HTTP 401
2025-12-16 10:36:54.885 [info] CURSOR LOG: Done streaming cpp with id ea34d9b5-c7b0-4e55-90c8-b0a3ea9df983
2025-12-16 10:36:54.885 [info] CPP RT LOG: Time taken for streaming cpp 878.653076171875 with request ea34d9b5-c7b0-4e55-90c8-b0a3ea9df983
2025-12-16 10:36:54.886 [info] CPP Request Log with id ea34d9b5-c7b0-4e55-90c8-b0a3ea9df983
2025-12-16 10:36:54.886 [info] =======>Model output 

2025-12-16 10:36:54.886 [info] =======>Debug stream time 19.561955999583006
2025-12-16 10:36:54.886 [info] CURSOR LOG: Error in streaming cpp (connect error) [unauthenticated] HTTP 401
2025-12-16 10:36:54.999 [info] CURSOR LOG: Done streaming cpp with id cd543525-989f-4359-a363-a7fdd2ead708
2025-12-16 10:36:54.999 [info] CPP RT LOG: Time taken for streaming cpp 859.722412109375 with request cd543525-989f-4359-a363-a7fdd2ead708
2025-12-16 10:36:54.999 [info] CPP Request Log with id cd543525-989f-4359-a363-a7fdd2ead708
2025-12-16 10:36:54.999 [info] =======>Model output 

2025-12-16 10:36:54.999 [info] =======>Debug stream time 18.02631799969822

Steps to Reproduce

1

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

version:2.2.20
cursor

Does this stop you from using Cursor

No - Cursor works, but with this issue

1 Like
2

i confirm i disable http2

Cursor_aKN26AASMh
Cursor_aKN26AASMh1257×324 12.5 KB

3

Me too. My chat is fine, but the cursor tab is not working anymore, it keep print 401 in the Cursor Tab Output window. I’ve already tried logout and login again.

4

Me too. chat is fine. log:

Screenshot 2025-12-16 at 11.05.45
Screenshot 2025-12-16 at 11.05.452532×792 420 KB

5

I encountered the same issue, but after enabling HTTP/2, the tab went back to normal. I’m not sure what caused it.

6

Try to Switch the network option to http/2

image
image718×213 7.53 KB

1 Like
7

The same problem for my cursor (version: 2.2.23).

8

Me too

9

me too

10

Worked for me,but chat not work after enabling HTTP/2

11

Because Sonnet does not support certain countries, using HTTP/1.1 is a temporary solution…

12

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

All network tests are passed, and agent/ask mode is still running, only tab failed, the log is here:

2025-12-16 09:05:46.460 [info] =======>Debug stream time 19.509717999957502
2025-12-16 09:05:46.460 [info] CURSOR LOG: Error in streaming cpp (connect error) [unauthenticated] HTTP 401
2025-12-16 09:05:47.582 [info] CURSOR LOG: requestId 588d9554-f1e2-4ae1-8800-32b4a72ce89c  
2025-12-16 09:05:48.590 [info] CURSOR LOG: Done streaming cpp with id 588d9554-f1e2-4ae1-8800-32b4a72ce89c
2025-12-16 09:05:48.590 [info] CPP RT LOG: Time taken for streaming cpp 1008.746337890625 with request 588d9554-f1e2-4ae1-8800-32b4a72ce89c
2025-12-16 09:05:48.590 [info] CPP Request Log with id 588d9554-f1e2-4ae1-8800-32b4a72ce89c
2025-12-16 09:05:48.590 [info] =======>Model output

Steps to Reproduce

just use tab can reproduce

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

版本: 2.2.20
提交: 1.105.1
日期: b3573281c4775bfc6bba466bf6563d3d498d1070
Electron: 2025-12-12T06:29:26.017Z
ElectronBuildId: 37.7.0
Chromium: undefined
Node.js: 138.0.7204.251
V8: 22.20.0
OS: 13.8.258.32-electron.0

For AI issues: which model did you use?

Tab

Does this stop you from using Cursor

Yes - Cursor is unusable

13

Hey everyone, we had a few incidents affecting Cursor Tab, but it should be working now.