TestFlight Install Error "The requested app is not available or doesn't exist" 8 days no response from support

I am having an issue where my builds are marked green and ready for testing, but when I go to install from TestFlight I get the following message:

"Could not Install X App"

"The requested app is not available or doesn't exist"

I've tried troubleshooting with information found online, tried different testing users. New builds. All result in the same message.

Multiple support emails to Apple Developer. No response in 8 days.

TestFlight Install Error "The requested app is not available or doesn't exist" 8 days no response from support
 
 
Q