Unable to open and edit jupyter notebooks

[LeninGF]

I get lots of warnings when I install ein. The command provided produced essentially

⛔ Warning (comp): /home/leningfe/.emacs.d/elpa/ein-20250307.1731/ein-traceback.el: Error: error Given parent class ein:codecell is not a class

The template produced:
Debugger entered--Lisp error: (void-variable ein:jupyter-server-buffer-name)
ein:dev-dump-logs(#<buffer ein:bug-report>)
ein:dev-bug-report-template()
funcall-interactively(ein:dev-bug-report-template)
command-execute(ein:dev-bug-report-template record)
execute-extended-command(nil "ein:dev-bug-report-template" "ein:dev-bu")
funcall-interactively(execute-extended-command nil "ein:dev-bug-report-template" "ein:dev-bu")
command-execute(execute-extended-command)

Generally I tried ein:run followed by ein:login, it presented the menu in emacs screen. I was able to create a notebook but I cannot open it