I have the same issue. When trying to select the date, the calendar appears green (available) and instantly turns all the dates red with the current date blue. It is not possible to select a date other than today. When trying to select a different time, nothing appears for options when clicking hour.
I also have holiday rules programmed, however, not for the days in which I am trying to book. If I remove them all, will the booking system work again?
In case it helps, here is the booking site: https://www.lighthouseladder.com/book-your-coaching-call/
**Just as a follow-up, I removed all the holiday rules and the booking calendar still does not work.**
I do have rules for the days and times people work. Could that be an issue? I thought service hours could be different for each person.