Registration for a recurring zoom meeting

Had multiple issues:

Registered participants unable to attend the session.

Troubleshoot by:
1. Clicking on the join button on confirmation email received
2. Copy & pasting the link into browser
3. Using the meeting code and passcode
4. Using a forwarded link from other participant
5. Clicked on the top left hand corner to copy and paste the link of the zoom session for other users.

All of the above steps ended up routing participants back to the registration page and not being admitted into the zoom meeting.

Can someone please advise..