In the “.kodi/addons/script.plex/lib” folder :
– backgroundthread.py
– main.py
– player.py
In the “.kodi/addons/script.plex/lib/windows
– home.py
And in the “.kodi/addons/script.plex/lib/_included_packages/plexnet” folder :
– gdm.py
– util.py
In these files, replace all “isAlive()” by “is_alive()” without quotes