Ah yeah I was testing a script for a video tutorial and noticed the branch of the RuntimeMeshComponent is updated for 4.16 but broken for 4.15 at the moment. ( Pinging @Koderz )
I’m not in front of UE at the moment to check, but if I remember right you just need to change line 72 in RuntimeMeshComponent.h to :
struct TStructOpsTypeTraits<FRuntimeMeshComponentPrePhysicsTickFunction> : public TStructOpsTypeTraitsBase