Adam Burns

Thank @wictorwilen and @RickVanRousselt. Yes, it did work! I guess I should have tried that, but the error is, of course, misleading. @RickVanRoussel. Can you mention which exact documentation you...

FYI, I also tried to upload the demo app from here: https://docs.microsoft.com/en-us/microsoftteams/platform/tabs/how-to/tabs-in-sharepoint. I assume this is the same basic scenario. Neither the app I built, nor the demo app worked...

I can confirm this. The strange thing is that it would often work without the tenant ID, most of the time, maybe 85%? So to be specific, the overload with...