What date is it for you in game? Real date or do you TT at all? Not sure it's relevant, just any other info so we can maybe think about what's happening.
i don't think it should affect it when i've had one and that never happens. (at least not after the update, but i don't think they should change that?)
Eta: here's a reddit thread that looks as if it had the same problem. OP deleted their question but the first comment mentions not saving and quitting properly the night before (I think someone mentioned that in this thread already), so that might be it?
i've noticed quite a few bugs here & there with the new update, but this certainly isn't a bug because that's a whole sentence that looks like they meant to put there. can you tell us anything that happened recently?
that message can't be a random glitch though, i mean obviously still a glitch, but that "message" came from somewhere so it has to mean they have something in store for store upgrade? exciting if so