I found this error when doing a new game update. Oddly, the only place in my code referencing Firebase is...
All other Firebase plugins or references are not used in the app.
Must I include a plugin or Firebase initialization reference if I'm going to useFCM=true for notifications? Previously, I had that but the conflicts between the Firebase apps from Scott and the Notification support from Corona were making integration impossible.
I haven't experienced any problems about this code until today's beta build. Now I can't repeat it, but it still has me concerned - it occured when I did an app update.