My custom level keeps crashing

[Tanshaydar]

If you are going to activate the grunt upon entering map, why not letting it already activated? I mean this is for the code just you wrote.

Other code would not work, because you didn't call the function EnemyDisabled anywhere in your script. It's not an interaction function either. You should understand that one piece of code serves to the coder's intention. It's not to work under every circumstances. You need to look at wiki.