When using the "Meeting limit for Primary Guest", and a guest is trying to schedule additional meeting in the time period configure.
The current behavior is that Chilipiper is showing the calendar and when the person is trying to schedule a meeting it blocked it as expected but the error message is very vague.
I would recommended first, not showing the calendar option.
Second, if there is no option, to allow an Admin to configure a customize error message in the "Meeting limit for Primary Guest" settings of the meeting type.