Youd have to download engine symbols - and you really should anyway - but its pointless for the problem at hand.
Your FBX export is probably bad/compromised or contains data it shouldn’t.
As far as plugins, etc.
There was one related to cars floating around the forum recently, but finding a specific needle in a haystack of similar needles is probably easier a task…
Base setup for vehicles (assuming no complex vehicle setups);
Armature + root bone.
Parented mesh - without wheels.
1 bone per wheel, parented to root - all pointed to the same side with the same bone rotation/axis.
Export to FBX even with the default blender plugin.
Import in engine, then set up wheels with a wheel mesh as you normally would.
Make sure your blender scene uses the correct Scale before you start working the armature setup.