Drakuor

I am having some difficulties getting the Android version of LaunchBox set up on my Onn 4K Streaming Box. I have it installed fine. I can load up LaunchBox just fine. I can import roms from the external USB drive attached. Where I run into difficulty is trying to launch games from within the APP itself. I have RetroArch installed, and can launch games directly from RetroArch, but LaunchBox will go to a black screen when attempting to launch games from within LaunchBox. What am I doing wrong? Please help!