Google Translate: "Before receiving the first prize for redeeming the faucet, before the toilet sign is set, the hotel is opened, and the check-in cannot be arranged, and after the toilet sign is set, the next day, the person runs away, and the game cannot be played."

Not Having the bathroom access sign should not block guests from being able to check in. I have played a couple times where I waited till long after, and guests could check in.

This sounds like a bug I've seen where guests glitch out at the front desk. But I've never seen them run away. If your first set of guests glitched out, then yes, your game will be unplayable. Just start over. These bugs don't usually happen every time. I wonder if the bugs at the Front Desk is due to some collision error. Maybe there was a box, or supply on the ground in front of the desk the guests ran into.