React-Native, Android, Genymotion: ADB server didn't ACK

I am working with React-Native, Android, and Genymotion on Mac. When I run react-native run-android I get this lines at the end of the launch operation:

...
04:54:40 E/adb: error: could not install *smartsocket* listener: Address already in use
04:54:40 E/adb: ADB server didn't ACK
04:54:40 E/ddms: '/Users/paulbrie/Library/Android/sdk/platform-tools/adb,start-server' failed -- run manually if necessary
04:54:40 E/adb: * failed to start daemon *
04:54:40 E/adb: error: cannot connect to daemon
:app:installDebug FAILED
FAILURE: Build failed with an exception.

What went wrong:

Execution failed for task ‘:app:installDebug’.

> com.android.builder.testing.api.DeviceException: Timeout getting device list.

…

However, adb devices returns this:

List of devices attached

192.168.59.101:5555 device

So far I’ve found no solution to run my app on the emulator. Has anyone encountered the same issue?

Thanks, Paul

#react-native