Error using Google Sign In in production

I recently released my app to production on the Play Store and it gives me several errors when authenticating via Google. I use the latest version of google_sign_in . When releasing my app to production I have updated my sha-1 and sha-256 keys to production keys. However, half the time that I try to authenticate using this method, I get the following error:

PlatformException(sign_in_failed, a6.b: 10: null,null)

This is where I authenticate the user: Main call:

                try{
                   AuthProvider authProvider = Provider.of<AuthProvider>(context, listen: false);
                   await authProvider.signInWithGoogle();
                   Navigator.pushReplacementNamed(context, 'mainScreen');
                } on ClientIsOfflineException{
                    NotificationsService.showSnackbar("Revise su conexión a internet");
                }catch(e){
                    showDialog(context: context, builder: (_){
                        return AlertDialog(
                            content: Text(e.toString()),
                            );
                    });
                }

authProvider.signInWithGoogle

        try{
        // Trigger the authentication flow
        final GoogleSignInAccount? googleUser = await GoogleSignIn().signIn();

        // Obtain the auth details from the request
        final GoogleSignInAuthentication? googleAuth = await googleUser?.authentication;

        // Create a new credential
        final credential = GoogleAuthProvider.credential(
          accessToken: googleAuth?.accessToken,
          idToken: googleAuth?.idToken,
        );

        // Once signed in, return the UserCredential
        return await FirebaseAuth.instance.signInWithCredential(credential);
        }on PlatformException catch(e){
            if(e.code == "network_error"){
                throw ClientIsOfflineException();
            }else{
                rethrow;
            }
        }catch(e){
            rethrow;
        }