Selecting FBX with raycaster

Your console is telling you that you are not passing an array to raycaster.intersectObjects.
If you must raycast only with a single object, either do raycaster.intersectObject (with no “s”)
either do raycaster.intersectObjects( [yourSingleObject] )

See the difference here : https://threejs.org/docs/#api/en/core/Raycaster.intersectObject