[FCMService] Firebase returned the following error (Code: messaging/mismatched-credential): SenderId mismatch

[TorranceYang]

Really enjoying this project, got it set up today on a Mac Mini! I did have one issue with notifications, so reporting what I can here. I did find a workaround which is at the bottom.

Issue
On a fresh install of the server, Firebase was recorded as configured correctly on both server + client, but was unable to receive notifications with error: [FCMService] Firebase returned the following error (Code: messaging/mismatched-credential): SenderId mismatch.

Details
Server

• 2014 Mac Mini
• OS 14.7.5
• Server version 1.9.7

Client

• Galaxy Fold 4
• Android 14 One 6.1
• Client version 1.13.2 2066

Attempted solutions

• Resetting server
• Clearing devices
• Switched to a manual Firebase configuration setup

Workaround
I managed to fix this one on my Fold by navigating to Settings -> Connection & Server -> Sign In With Google: Fetch Firebase Config by Signing in with Google and then signing in. That finally showed an active connection to the Firebase server and allowed me to received notifications.