Issue with Chaos Vehicle Plugin

I have 3 projects for testing purposes
why is it that of these 3 projects only 1 of them works correctly with Chaos Vehicle Physics even though they are all setup the same way not quite word for word

one of these projects is a a duplicate of the one that works correctly and it no longer functions

what is causing this problem because this is infuriating

back using Physx i had no problems creating vehicles but Chaos Vehicle Plugin has caused me nothing but problems

anybody else having this problem?