I cloned the git repo and ran into the same error trying to compile for 4.14 and the current promoted branch (4.15). In VS I got 3-4 messages like " ‘LineTraceSingle_NEW’: is not a member of ‘UKismetSystemLibrary’ " and the same for SphereTraceSingle_NEW. Deleting the _NEW suffix for those 3-4 instances let’s me compile it successfully (Not sure if this _NEW was an oversight, or if intentional and now something doesn’t work for me (I did not test every feature)). There was also a message about the “bWantsBeginPlay” flag, which is deprecated as of 4.14. That line of code can simply be removed.