I've had this problem for a couple of hours now: I can't change maps.
Try going from home island to my adventure or to ls adventure. Sometimes it works, mostly it doesn't.
The game just locks up with the popup
"Loading map
Loading map..."
blinking.
I've restarted steam. I've logged in and out at least 20 times. Same issue going home from adventure too.
Many others with the same issue in Help chat.