Keep Getting 403 from Jupyter lab

[Dororo99]

Hello, Im having trouble with jupyter lab.
I use vscode's terminal. When i start jupyter lab, below is the result

[W 05:40:20.271 NotebookApp] 403 GET /api/kernels?1708926020237 (127.0.0.1) 6.460000ms referer=None
[W 05:40:20.271 NotebookApp] Forbidden
[W 05:40:20.271 NotebookApp] 403 GET /api/kernels?1708926020238 (127.0.0.1) 6.610000ms referer=None
[W 05:40:20.271 NotebookApp] Forbidden
[W 05:40:20.272 NotebookApp] 403 GET /api/sessions?1708926020239 (127.0.0.1) 6.750000ms referer=None
[W 05:40:20.272 NotebookApp] Forbidden
[W 05:40:20.272 NotebookApp] 403 GET /api/kernels?1708926020239 (127.0.0.1) 6.900000ms referer=None
[W 05:40:20.272 NotebookApp] Forbidden
[W 05:40:20.272 NotebookApp] 403 GET /api/sessions?1708926020240 (127.0.0.1) 7.060000ms referer=None
[W 05:40:20.272 NotebookApp] Forbidden
[W 05:40:20.273 NotebookApp] 403 GET /api/kernels?1708926020240 (127.0.0.1) 7.110000ms referer=None
[W 05:40:20.273 NotebookApp] Forbidden
[W 05:40:20.273 NotebookApp] 403 GET /api/sessions?1708926020240 (127.0.0.1) 7.230000ms referer=None
[W 05:40:20.273 NotebookApp] Forbidden
[W 05:40:20.273 NotebookApp] 403 GET /api/kernels?1708926020241 (127.0.0.1) 7.370000ms referer=None
[W 05:40:20.273 NotebookApp] Forbidden

I tried #7272 but it doesnt work at all. And also, I paste jupyter server's URL into vscode then code in vscode IDE.
please help me.
thank you

[JasonWeill]

@Dororo99 Which operating system and which version of Jupyter Notebook are you using? Are you still seeing the errors if you run Jupyter Notebook in a terminal, using a web browser?

[Dororo99]

Surprisingly, after turning off and on the Server, it fixed. Idk why... but the problem fixed.

• My environment is Linux 5.4.0-42-generic & jupyter-notebook : 6.3.0

[RRosio]

Thank you for the update @Dororo99, I will close this issue as it seems resolved, but please feel free to reopen this with any further updates if the issue reemerges.