Yup, I had the same issue with 4.11 which I got via Github. I spotted the error in SwarmAgent’s log window telling it couldn’t cache the UnrealLightmass.exe which in turn didn’t exist in the Engine\Binaries\Win64 -folder.
Thanks Jin_VE 
Yup, I had the same issue with 4.11 which I got via Github. I spotted the error in SwarmAgent’s log window telling it couldn’t cache the UnrealLightmass.exe which in turn didn’t exist in the Engine\Binaries\Win64 -folder.
Thanks Jin_VE