All,
I created a default Tab app from the sample in VS Code and the app is able to load by itself just fine. However, I added capability to be loaded as part of a group meeting and when I try to load the app, I get the message below: Refused to display 'https://www.microsoft.com/' in a frame because it set 'X-Frame-Options' to 'sameorigin'.
Loading the app by itself continues to work.
I've tried changing the content to the bare minimum but still won't load.
Thanks for reaching out to us, you can follow this sample https://github.com/OfficeDev/TeamsFx-Samples/tree/dev/hello-world-in-meeting to add a Tab in the side panel of a meeting.