# Meeting SDK interfacing a Webinars Plus Event

**URL:** <https://devforum.zoom.us/t/meeting-sdk-interfacing-a-webinars-plus-event/142531>\
**Category:** Meeting SDK\
**Created:** [March 20, 2026, 9:56pm UTC](https://devforum.zoom.us/t/meeting-sdk-interfacing-a-webinars-plus-event/142531 "2026-03-20T21:56:52Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Attorney](https://avatars.discourse-cdn.com/v4/letter/a/258eb7/32.png) [@Attorney](https://devforum.zoom.us/u/Attorney)\
**Post date:** [March 20, 2026, 9:56pm UTC](https://devforum.zoom.us/t/meeting-sdk-interfacing-a-webinars-plus-event/142531/1 "2026-03-20T21:56:52Z")

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### 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.