We are having the same issues. I have been testing thru the night and got a few test reservations to go through on a PC but reservations on a smartphone had the same error you are getting. It is now morning here and all attempts with any platform seem to fail with the error “Sorry, No bookings are being accepted at that time” hopefully it will be resolved soon. Our bookings are down 80% since the problem cropped up.
I have added a Note of the issue and a “Call for Reservations” button in the meantime.
Hopefully some will use it.
Dave