Unable to book same day bookings

Our company is seeing the same error for all booking sites. Bookings site administrators are unable to create meetings from the site administration page. Appointments set from the published calendar seem to work fine, but Administrators cannot create or edit appointments without seeing "Sorry couldn't save the event. Please try again".

Update: switching to "Try the new Bookings" using the toggle in the upper right of the Admin page seems to resolve the error. We were able to edit appointments in the New Bookings interface.

Same issue here!