All of my testers are not able to install the app

It is showing:
"Could not install MY_APP_NAME. The requested app is not available or doesn't exist".

I provided correct bundle id, otherwise I cannot be able to upload the app to TestFlight. Testers can also see the app in testflight but are not able to install it.

What might me the cause of this issue and how can I fix it?
I sent multiple requests to apple developer but got no reply

Answered by Mumtaz1 in 913831022

Apple support is not even replying

Accepted Answer

Apple support is not even replying