Hi Andrew
There is a encryption key need to be set in this step.
https://docs.mendix.com/howto/mobile/native-remote-notifications#3-1-installing-your-module
Cheers, Andries
The microflow IVK_SaveFCMSettings tries to get the key (sring) from the private key file, however that is empty.
Make sure you have uploaded the private key from Firebase when you created the service account, see https://docs.mendix.com/howto/mobile/setting-up-google-firebase-cloud-messaging-server