TestFlight says it can’t install my app

I received the email to test the app in TestFlight. When I try to install the app it says the requested app is not available or doesn’t exist. Can someone help?

I would love to know how to trouble shoot this. I'm having a similar issue.

I too am having this issue - did you manage to find a solution?

TestFlight says it can’t install my app
 
 
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