TestFlight provisioning profile not valid

Question

I have submitted iOS app to TestFlight and when my internal testers try to download app it says the provisioning profile is invalid. I have verified that the provisioning profile is not invalid. Is there something else that could be causing this.

I am using Xamarin on windows. I was able to successfully submit a different app to TestFlight using same certificate and app id.

Basically what i am looking for is a way to troubleshoot this other than just looking at the status of profile on the app store.

Answer 1

So problem here was needed to use App Store distribution instead of ad-hoc which to me is confusing considering i only wanted app on TestFlight so hopefully this clears things up for someone else.