Problem: The host of an upcoming event sends an invite with a link to a rehearsal. When the participant attempts to join the rehearsal they receive an error that "The event is restricted".
Solution: In this case the event requires registration to gain access. The participant has to register for the event and then be approved by the host before they can join the rehearsal. Once the participant has been approved, there will be a email sent to them with a join link. This join link should be used instead of the host sending it directly to them. The join link in the email will have a parameter at the end of the url like, regid=XXXXXXXXX .