After updating home assistant to lastest version it just screw me totally and now my Tapo P115 doesn’t work… NOR I can add it!.
It says “Config flow could not be loaded: {“message”:“Invalid handler specified”}” When i try to add Tapo Back… Well this is my lesson in future to never ever update home assistant again. I am totally pissed and filled with rage right now.
I would try to restore the most recent full backup that you know was working before the update. That should get you back to running the quickest.
Also the which version question was to help identify the actual problem. There are several packages that have update cycles and knowing which software you updated and what the old version / new version is might help identify what went wrong.