I am very new to Microsoft Teams App. I tried the custom "hello world" app. C# application is set up correctly and I can see the output in the browser.
Validation of an app is successful in App Studio. Now, I uploaded custom apps to MS Teams but it gives error as mention in the title. I added a new policy in SetUp policy in the admin. center and added myself in Managed Users. Still, I am not able to see hello world message when my app is added as Tab in MS Teams portal. What am I missing here?