com.android.ddmlib.InstallException: Failed to establish session react-native

Question

I am trying to run react-native android app in my nexus5 emulator

adb devices
List of devices attached
emulator-5554   device

started pack

Answer 1

Even i had the same problem,but restarting the genymotion and running the "react-native run-android" again worked for me. Ensure genymotion is running before running the above command.