Constant "invalid authentication" from Sonos devices in logs

+1 here aswell, seems this is bug, most likely due to that “old token” mentioned in this chat is still on and has not been fixed yet.

I’ve opened a request here, couldn’t find any, but also hoping not duplicating:

Once in while I also get this invalid authentication error for one of my 5 Sonos speakers. It can be the one in the kitchen or in bathroom or… couldn’t find any pattern why.
Your solution worked fine for me. I actually used the another TTS service, the one from amazon and it also worked. To clear the playlist did not work though