D/FirebaseInstanceId(10225): background sync failed: INVALID_PARAMETERS, retry in 20s
I have been trying to implement notifications, first directly through Firebase, then through VS App Center, in both cases I getting the same error, but have no idea why.
What I have tried:
Remove bin/obj folders
Clean solution
Remove app from existing device (Samsung Note 9 on android pie)
I've downloaded multiple FCM examples and could not get them to work as well so I'm not sure what I could be missing.