Unity - Fixing Firebase or GPGS Infinite Import Loop Error

There are many solutions for this issue available online.

In my case, it occurred when importing multiple versions of Firebase.

Force resolution won't fix this, so you need to manually remove duplicate files.

If you find files like "~1.0.7" and "~1.0.8" that have the same content but different versions, find and delete all older versions.

Check for duplicate downloads between the Firebase folder's Android plugins and the Plugins folder's Android plugins.