Google Sign In error 12500

Question

I am trying to integrate Google Sign In into my app. I don\'t have a back-end server, I am just getting the details of the logged on Google Account to my app.

I firs

Answer 1

I experienced the same problem after opening my project on another computer (different Android Studio). In my case, I solved it using the Firebase Assistant, which I had used to setup Firebase initially. Opened the Firebase Assistant (Tools > Firebase) and selecting Authentication > Connect. This reconnected the project to Firebase and updated the configs