After I followed the instructions to create and upload the public.pem file in App Integrity Section
/Change how your responses are encrypted and decrypted
I got the following error message:
Couldn't upload. Try Again
It appeared without any other information.
How to solve this? Note that I didn't upload any apk/bundle app to the console just yet because I'm still in the development process.
I expected that the file would be successfully uploaded so I could download the generated file from the console.
The issue is fixed now, thank you again for reporting the issue!