If you use other mods, copy it normally to the game folder. If you only use vorpX and no other mods, you can alternatively just copy ScriptHookV.dll to C:\Program Files (x86)\Animation Labs\vorpX\Plugins. vorpX loads it from there if it’s not in the game folder.
If that does not help:
Try without the dedicated mod portion that comes with vorpX since last summer. Not sure, but I could imagine that it’s not compatible with FiveM. Of course the would disable all the good stuff that the mod provides (better G3D, VR compatible FOV, decoupled walk/look, optimized cameras etc.), but with some luck it *might* at least allow you to play FiveM in immersive screen/cinema mode.
The mod portion of the profile can be disabled by renaming/removing vpxGTAV.dll from the vorpX plugins folder mentioned above.