[2016.06.17-08.55.05:809][501]LogLinker:Warning: Can’t find file ‘/Game/PlayerBP/MYGameMode’
[2016.06.17-08.55.05:809][501]LogUObjectGlobals:Warning: Failed to find object ‘Class /Game/PlayerBP/MYGameMode.MYGameMode_C’
Check the game mode
does your project have a default game mode?
did you set it in world settings?
does not its name have an illegal character ‘.’?
does it exist in content folder in the same location as warning.
it will be nice to cook only maps
go to projectsetting> packaging> cook only maps