Errro 400 and malformed http

JupyterLab
1

Hi, I wanted to use Jupyter Lab but no matter what I do I’m getting Error 400 in web browser and this in Windows terminal like below:
[W 2024-12-29 17:46:34.533 ServerApp] A _jupyter_server_extension_points function was not found in jupyter_lsp. Instead, a _jupyter_server_extension_paths function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
[W 2024-12-29 17:46:34.639 ServerApp] A _jupyter_server_extension_points function was not found in notebook_shim. Instead, a _jupyter_server_extension_paths function was found and will be used for now. This function name will be deprecated in future releases of Jupyter Server.
[I 2024-12-29 17:46:34.639 ServerApp] jupyter_lsp | extension was successfully linked.
[I 2024-12-29 17:46:34.643 ServerApp] jupyter_server_terminals | extension was successfully linked.
[I 2024-12-29 17:46:34.648 ServerApp] jupyterlab | extension was successfully linked.
[I 2024-12-29 17:46:34.654 ServerApp] notebook | extension was successfully linked.
[I 2024-12-29 17:46:35.263 ServerApp] notebook_shim | extension was successfully linked.
[I 2024-12-29 17:46:35.307 ServerApp] notebook_shim | extension was successfully loaded.
[I 2024-12-29 17:46:35.309 ServerApp] jupyter_lsp | extension was successfully loaded.
[I 2024-12-29 17:46:35.310 ServerApp] jupyter_server_terminals | extension was successfully loaded.
[I 2024-12-29 17:46:35.312 LabApp] JupyterLab extension loaded from C:\Users\kop52\anaconda3\envs\jupyterlab-older\Lib\site-packages\jupyterlab
[I 2024-12-29 17:46:35.312 LabApp] JupyterLab application directory is C:\Users\kop52\anaconda3\envs\jupyterlab-older\share\jupyter\lab
[I 2024-12-29 17:46:35.313 LabApp] Extension Manager is ‘pypi’.
[I 2024-12-29 17:46:35.316 ServerApp] jupyterlab | extension was successfully loaded.
[I 2024-12-29 17:46:35.321 ServerApp] notebook | extension was successfully loaded.
[I 2024-12-29 17:46:35.322 ServerApp] Serving notebooks from local directory: C:\Users\kop52
[I 2024-12-29 17:46:35.322 ServerApp] Jupyter Server 2.14.1 is running at:
[I 2024-12-29 17:46:35.322 ServerApp] http://localhost:8888/tree?token=fc8c10ff53bec6fcc2162f752e7ea1851b575068acef3287
[I 2024-12-29 17:46:35.322 ServerApp] http://127.0.0.1:8888/tree?token=fc8c10ff53bec6fcc2162f752e7ea1851b575068acef3287
[I 2024-12-29 17:46:35.322 ServerApp] Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
[C 2024-12-29 17:46:35.385 ServerApp]

To access the server, open this file in a browser:
    file:///C:/Users/kop52/AppData/Roaming/jupyter/runtime/jpserver-29488-open.html
Or copy and paste one of these URLs:
    http://localhost:8888/tree?token=fc8c10ff53bec6fcc2162f752e7ea1851b575068acef3287
    http://127.0.0.1:8888/tree?token=fc8c10ff53bec6fcc2162f752e7ea1851b575068acef3287

[I 2024-12-29 17:46:35.469 ServerApp] Skipped non-installed server(s): bash-language-server, dockerfile-language-server-nodejs, javascript-typescript-langserver, jedi-language-server, julia-language-server, pyright, python-language-server, python-lsp-server, r-languageserver, sql-language-server, texlab, typescript-language-server, unified-language-server, vscode-css-languageserver-bin, vscode-html-languageserver-bin, vscode-json-languageserver-bin, yaml-language-server
[I 2024-12-29 17:46:36.706 ServerApp] Malformed HTTP message from ::1: Malformed HTTP request line

and can not do anything woth thos errors.
using latest Anaconda3 on Windows 11 Insider Canary tried both latest and two earlier versions of Jupyter Lab same goes for Jupyter Notebook Voila.

2

Does anyone knows whet can be done with this

3

This sounds like it could be a browser issue? Did you try in another browser?

4

Yes tried chrome,edge,Firefox and all of em tested with both normal and private session.

5

It looks like this was reported previously in Notebook gets Malformed HTTP headers from Chrome · Issue #2265 · jupyter/notebook · GitHub. In that case it seemed like a conflict between serving expecting HTTP but browser sending HTTPS requests?

Some things I would try if I faced this:

6

Hi sorry for late response.
I’ve tried it on firefox and will try to use your instructions.