I am not able to run the sample react Native AwesomeProject project.

Can anyone help? Below is the details.

C:\Users\dip\AwesomeProject>react-native run-android 'yarn' is not recognized as an internal or external command, operable program or batch file.
Scanning 557 folders for symlinks in C:\Users\dip\AwesomeProject\node_mo ules (31ms)
JS server already running.
Building and installing the app on the device (cd android && gradlew.bat instal Debug)...
Error occurred during initialization of VM
java/lang/NoClassDefFoundError: java/lang/Object
Could not install the app on the device, read the error above for details. Make sure you have an Android emulator running or a device connected and have set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html