M-x jupyter-repl-associate-buffer does not associate non-python buffers

[vibrys]

thank you for emacs-jupyter. I'm trying it for a week and it looks like working solution.

I just stumped upon following workflow I'd like to have running: When I browse some python documentation in w3m, I'd like to evaluate it in some python jupyter REPL. For that I hoped following would work:

1. while within w3m buffer: M-x jupyter-repl-associate-buffer (- new REPL is started)
2. M-x jupyter-repl-interaction-mode (- keybindings for interaction with REPL are created)
3. mark some python region, then C-c C-c brings error: (wrong-type-argument "Not a valid client" nil jupyter-current-client)

Is it bug or am I doing anything wrong?

[IshmaelBelghazi]

Getting the same issue with wolfram-mode.