Tuition is demanded
The whole world is topsy-turvy right now. You probably have a contract that says you owe the money, and I'm guessing that the contract says nothing about Covid-19. It might say something, however, about unavoidable closures, but such language is probably only intended for short term closures, like a snow day or two.
Bottom line -- I dunno. And I don't think anyone else really knows either. You can talk to an attorney to review your contract. For now, I would suggest that you withhold payments, until we see what's going on.