Firebase authentication build error

[Rahan_Sarang]

Got the solution

Unable to generate apk because of Firebase, Firebase config file error

To be honest I have no knowledge of Firebase. But by looking at one of the json files that were lying around here on my PC, I saw that one line was missing in both cases "firebase_url": "https://your-projekt-id.firebaseio.com", if it is the right/correct one I have no idea.. "project_info": { "project_number": "123456789", "firebase_url": "https://your-projekt-id.firebaseio.com", "project_id": "your-projekt-id", "storage_bucket": "your-projekt-id.appspot.com"