Hi,
Yes, it is a community, but note that there are two types of users: premium and free. From our side, we cannot provide support for a longer period than you purchased when you bought the theme, as we have limited resources. If you need further assistance, I recommend that you consider renewing your premium support: Renew Support | HivePress
As for the issue, please see the solution in this topic: The booking cannot be made if someone try to book "today" date from the calendar