http listener plugin fails to load

[Number8]

Hello
I just installed http listener plugin. It fails to load

2021-10-19 07:29:33.579 Error: HTTP_listener: (HTTPListen) failed to load 'plugin.py', Python Path used was '/home/pi/domoticz/plugins/httpListener/:/usr/lib/python37.zip:/usr/lib/python3.7:/usr/lib/python3.7/lib-dynload:/usr/local/lib/python3.7/dist-packages:/usr/lib/python3/dist-packages:/usr/lib/python3.7/dist-packages'.
2021-10-19 07:29:33.579 Error: HTTP_listener: (HTTP_listener) Module Import failed, exception: 'ImportError'
2021-10-19 07:29:33.579 Error: HTTP_listener: (HTTP_listener) Module Import failed: ' Name: Domoticz'
2021-10-19 07:29:33.579 Error: HTTP_listener: (HTTP_listener) Error Line details not available.

I have no clue how to troubleshoot it. Other python plugins are running without any troubles. Does someone is having an idea?
Running 2020.2 12485 on Debian. Python 3.7.3
Thank you