What happened to my MUSEUM?

Okay, I have been gone for awhile, but WHAT happened to my Museum? everything is GONE. I didn’t go any further then New England as that was COMPLETED and now it’s Empty. HELP Please

Are you sure you completed it in SWL and not in the old game? There isn’t a reason anything would get removed from the museum if it was unlocked here, so if you double check to make sure you’re in the correct wing, you’d have to open a support ticket.