Python ext - cannot run&debug code

[BlindB0]

Ubuntu 20.04 x64
Python 3.8.5 (latest from repo) (installed pip, wheel, python3-venv)
code-server: v3.7.1 , (via https://code-server.dev/install.sh)
Installed python extension (v2020.11.367453362) and jupyter (v2020.12.0-dev)
It seems that code-server cannot initialize that extensions. But no errors in code-server.
When open .py file I can`t see Python interpreter in lower left corner on statusbar.
Run by Ctrl-F5 - no error, no output in console or terminal.
Set breakpoint - no stopping.
When do "Jupyter: Create New Blank Jupyter Notebook" - get error: "resulted in an error (command 'jupyter.createnewnotebook' not found)"
Whet do "Python: Create terminal" - get error: "(command 'python.createTerminal' not found)"
Same as "Python: Select Interpreter" - not found.
...
Same behavior on two systems Ubuntu 20.04 and 20.10. No matter run by user or by service via sudo.

May be it`s all my fault and I do something wrong? First time with VS Code, only vim before.

[code-asher]

Definitely not your fault, it looks like our build of the Jupyter extension has some problems. Tracking here: #2341