Error : Not able to connect thing and companion app

[dpnkrg]

How to solve this error :

10-24 06:55:38.922 3975-3975/com.example.androidthings.robocar I/FirebaseInitProvider: FirebaseApp initialization unsuccessful
10-24 06:55:38.925 3975-3975/com.example.androidthings.robocar I/InstantRun: starting instant run server: is main process
10-24 06:55:39.910 3975-3975/com.example.androidthings.robocar D/vndksupport: Loading /vendor/lib/hw/android.hardware.graphics.mapper@2.0-impl.so from current namespace instead of sphal namespace.
10-24 06:55:39.928 3975-3975/com.example.androidthings.robocar E/RobocarActivity: Google API connection failed: ConnectionResult{statusCode=UNKNOWN_ERROR_CODE(8050), resolution=null, message=null}

[dpnkrg]

I had tried with Android Things 1.0.0. Exception not occur in version 1.0.0.