In the log, it says

UnityException: Tag: car is not defined.
  at PlayerController.OnTriggerEnter (UnityEngine.Collider other) [0x00000] in <filename unknown>:0 

I'm checking against the tag car when colliding, why does this happen? I have tagged the object, see picture below

heres some code

void OnTriggerEnter(Collider other)
    if (other.gameObject.CompareTag("car"))//error here
        //more code

enter image description here

  • \$\begingroup\$ I think you didn't apply the changes. Anyways it was a different thing. Can you post some of your code and full inspector window snap? \$\endgroup\$ – Hamza Hasan Dec 14 '15 at 21:46
  • \$\begingroup\$ @HamzaHasan yeah just changed the Q. Which part of the code do you want. I'll add some to the question \$\endgroup\$ – Hamzah Malik Dec 14 '15 at 21:47
  • \$\begingroup\$ Seems everything fine. Try by restarting Unity. May be inspector settings got corrupt and may need restart. \$\endgroup\$ – Hamza Hasan Dec 14 '15 at 21:51
  • \$\begingroup\$ I don't think your tags are there. \$\endgroup\$ – Alec Teal Dec 14 '15 at 21:59
  • \$\begingroup\$ Its a bug. If you can reproduce it, please report it to Unity \$\endgroup\$ – Hamza Hasan Dec 14 '15 at 22:29

The problem was that there weren't actually any tags in Edit > Project Settings > Tags and Layers, even though there were in the inspector

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