I cannot fully confirm what is going on there, but:
- Add your app package name to your Firebase project settings
- Make sure you can see some database in Realtime Database page, so RTDB has been enabled for the project
- Download an updated
google-services.json, and update the Kodular project. It is very important the file is downloaded after those two steps, as it will be different - Try building the APK.
google-services.jsonis tied to specific package names, and it’s very likely the Companion is not in the allowlist…