Please help a newbe with nexus 7 launch

Hi all im having real trouble getting the simplest of projects to deploy to android. I ether end up with a pix elated display which is caused by HDR being on in settings. When its unchecked I just get a black screen with joysticks. Ive tried all graphic formats DXT Ect1 etc etc…

Errors that often show up in unreal log;

LogStats:Warning: MetaData mismatch. Did you assign a stat to two groups?

thanks guys