Make sure that you download the updated ‘Rocket League [vorpX]’ profile from the cloud I mentioned above. The profile that comes with vorpX currently does not have DX11 support, you need the updated cloud profile.
If you already did that: as always with hooking problems, please first and formemost check the pinned trouble shooting post on top of this sub forum. 99% of hooking problems are caused by some interfering background application, most likely some annyoing and unnecessary third party AV program.
That is the case, but the profile was updated after the last vorpX update – as you could have noticed by reading the very first reply to the original post before posting yourself. Sorry, I clearly shouldn’t have said that, but couldn’t resist. :)