Once a webinar is created, Panelists received a separate email invite for the webinar as below:
1. Click Add to Calendar which will download a calendar file. Click to open the calendar file
2. The meeting dialog box will appear, click Save & Close to add this to your calendar. Use the link attached when joining as a Panelist in the webinar.
3. If you're already in the webinar as an attendee and was made a panelist, leave the webinar and click the link from the Panelist email invite.
https://competenz.freshservice.com/support/solutions/articles/5000081654