I've had this issue previously and didn't know how to fix it except by creating a new link and sending out a fresh one to the other participant. However, I sent this to dozens of people and we were all stuck in separate rooms, on the same link. I need help how I can solve this issue so I won't have this problem in the future.
TO CLARIFY THE EVENTS THAT HAPPENED:
It sounds like some or all users are in the waiting room pending admission by the host.