Hi !
Near the same error with the nut plugin :
2020-11-15 01:16:34.813 Error: (NUT_UPS) failed to load 'plugin.py', Python Path used was ':/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'.
2020-11-15 01:16:34.813 Error: (Onduleur Baie Sous-sol) Module Import failed, exception: 'ModuleNotFoundError'
2020-11-15 01:16:34.813 Error: (Onduleur Baie Sous-sol) Module Import failed: ' Name: plugin'
2020-11-15 01:16:34.813 Error: (Onduleur Baie Sous-sol) Error Line details not available.
/etc/init.d/domoticz.sh status --> active exited. Just move the plugin then restart --> active running
@Jumper3126 : Did you manage to solve your problem ?