Firebase: Cannot upload production APNs certificate

Question

I am currently testing an app in TestFlight and need a production APNs certificate in order to test Notifications in Firebase.

I have followed all of the steps in th

Answer 1

When I tried the solution suggested here, nothing works (This probably means I am doing right). I solved this issue by replacing Chrome (The application is running for a very long time) with Safari (I invoke the application just for this purpose) for the upload.

That means, if restart Chrome might also work.

FYI.

Answer 2

In my case I wanted to upload a production certificate to Firebase, and after trying everything I finally realized that I had created a development certificate on iOS Developer...