KeyNotFoundException:The given key was not present in the dictionary.

So I was just kind of practicing my skills, but I ran into a problem that I couldn't find the answer to ( it may be a simple fix). It has to do with Input.GetKeyDown. So the error I get is this. KeyNotFoundException:The given key was not present in the dictionary. If you find the problem I will very grateful to you. Thanks! Here is my code:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PortalMove : MonoBehaviour {

 public Animator anim;


 // Use this for initialization
 void Start () {
     anim = GetComponent<Animator>();
 }
 
 // Update is called once per frame
 void Update () {
     bool move = Input.GetButtonDown("Jump");
     anim.SetBool ("Stop", move);
 }

}
(BTW, I am pretty sure it is line 11 (the bool line) that is the problem)