Hi,
minor report, but since this one is well hidden I preferred to write something about it. In the CollisionQueryParams.h file, under the struct FCollisionQueryParams you have :
struct ENGINE_API FCollisionQueryParams
{
[…]
	/** Whether we want  */
	bool bFindInitialOverlaps;
	/** Whether we want to return the triangle face index for complex static mesh traces */
	bool bReturnFaceIndex;
I believe there is the end of the comment missing here for bFindInitialOverlaps.