Build fail with proguard

Dear MedAmine_BSalah,

for me this project fails with

Unexpected failure to resolve a method: void com.mygdx.game.MyGdxGame$X.<init>(com.mygdx.game.MyGdxGame)
 java.lang.NoClassDefFoundError: com.mygdx.game.MyGdxGame$X

where

private class X extends com.sun.nio.sctp.AbstractNotificationHandler

but that class is not available in the MOE SDK. See:

Best Regards,
Kristóf