Cannot get Pyright nor Pyrefly working with code-server.

[JacekHoleczek]

I am trying to play with the code-server on a Ubuntu 22.04 / x86_64 machine (Python 3.10.12).

I tried three recent versions: "v4.108.1", "v4.107.1", and "v4.106.3".

I manually install/unpack the code-server-*-linux-amd64.tar.gz file and run it using the ~/.../code-server-*-linux-amd64/bin/code-server command.

For each version, I always start with a "clean" environment:

rm -rf ~/.local/share/code-server/ ~/.config/code-server/ ~/.cache/Microsoft/ ~/.cache/pip/ ~/.ipython/ ~/.jupyter/ ~/.local/share/jupyter/ ~/.cache/jedi/

I connect to the server using Firefox (a "new private window").

I install the "Python (ms-python)", "Jupyter (ms-toolsai)", "Pyright (ms-pyright)", and "Pyrefly - Python Language Tooling (meta)" extensions.

I can then selectively "Disable" and "Enable" the "Pyright" and "Pyrefly".

When I open a ".ipynb" file ...

... "Pyright" never works ...

... "Pyrefly" works only with "v4.106.3".

No warnings or errors are reported in the code-server's console.

The command "Python: Restart Language Server" results in an error "command 'python.analysis.restartLanguageServer' not found".
This is a problem when I need to change the kernel to another "Python Environment" (the LSP server should "switch" to a different set of Python packages available in the new "virtual environment").

What am I possibly missing?