I started seeing the following error when launching the app fresh on my Pixel 8 Pro running the latest Android 15:
Push Registration Failure:
Make sure that this app has
permission to use push
notifications. Error:
java.util.concurrent.ExecutionExcep|
java.io.IOException:
FIS_AUTH_ERROR
A quick search of StackOverflow reveals this is likely something on the application side related to web API keys having insufficient permissions. I do see another similar topic here, but that issue was related to the user not having play services installed. This phone has play services, and the error is slightly different (FIS_AUTH_ERROR vs MISSING_INSTANCEID_SERVI)
With all that said, it does appear that I am still getting alerts in a timely fashion.