This person isn't available on this date. Please choose another date or person.

Hi all,

Up until recently this was working but today it seems to have stopped. I simply cannot add a booking to a service.

Business hours are 12AM - 11:50PM.
Staff availability is 12AM - 11:50PM. Unchecked 'Events on Office calendar effect availability' 

Service is 1 day (12AM - 11:50PM).

Whenever I try and add a booking it tells me 'This person isn't available on this date. Please choose another date or person.' 

I have also tried with a 30 minutes service but it doesn't matter that day I choose, I get the same message.

Can anyone help with this?