I checked out Kodular Fenix (v1.5.0) Bug Tracker before creating a new topic
It will be helpful to you if you provide some screenshots of the error you got + The app you are trying to upload.
When i upload AAB an error message is showed by google as mentioned in the screenshot but when i remove google service json no error message is displayed
Share your apk
Read the error message completely…
There have been found multiple metadata elements…
A simple search in the community for android.gms.version provides these threads