Well it seems to have cleared up for me. I was finally able to continue collecting and reassign characters, etc.
@Denisgarfield74
You probably need to open up some free storage on your device. You have to have several more megabytes of storage free as swap space in addition to the space the game files take up. That's where your town is built - when you're scrolling through your town you're actually looking at a graphically rendered area of storage.
Additionally, the game menus are stored there. They're built as you play, according to which characters and buildings you own.
You might also check and make sure file offloading isn't turned on in your device settings. Just learned about that one this week...
