403 -Forbidden: Access is Denied

Hi,
We installed Jitsi meet on uBuntu VM in Azure. We are using wildcard certificate and after installation when we try to go Jitsi meet site, we get 403 error. We are able to access the site by IP address and start the meeting but it disconnects every minute.
Below are the URLs
By Domain Name: https://eimtrm.educosoft.com
By IP Address: https://40.79.40.109

Please advise on what to check and fix the issue.