If I have two of my sqeueezeboxes synchronized I usually get "Username or password invalid" when trying to play from spotify. If the music is already playing I sometimes manage to sync the boxes. When the music stops I have to remove sync to avoid the error when starting to play again.
Doesn't spotify support synced squeezeboxes?
Solved! Go to Solution.
before syncing your players using Spotify have each player play via Spotify unsynced for awhile. After I have done this I have been able to sync them without any errors. Unfortunately this has to be redone each time after an player had been turned off.