Thank you for reporting this issue. Are you able to reproduce this issue, are you only seeing this with the Webinar ID provided or one this a one time issue that you encountered?
Thank you for the update. Without steps to reproduce the issue, it’s difficult to comment on the cause here. Are you able to provide a public git repo containing code I can use to test this? I’m not seeing the same issue with the Sample Web App but it sounds like the steps to reproduce the issue here might be complex.
I would also watch for any new instances of this error and if you’re able to determine any commonalities we can investigate the issue from there.