Meeting SDK interfacing a Webinars Plus Event

I am trying to run the Meeting SDK against a Webinar Plus Event.

I have Meeting SDK enabled in my application.

I am using a ZAK token to get into the webinar/event.

I have been able to successfully test the same client side setup against a regular webinar. My app is not submitted, but it is ‘Active for internal users’ and like I said I was able to successfully test against a regular webinar.

When I test against an event I get an invalid signature. I am logged into the event and both in backstage and in the webinar it gives me that error via the SDK.

Please let me know what I am doing wrong or any leads that can help me troubleshoot the issue.