MissingMethodException: Method not found- Error on fps script

I started making an FPS game 2 days ago using tutorials on the internet and I have a problem with some of my code. This script was shown on a tutorial but when I used it I got an error In-Game. This is the code.

 var cameraObject : GameObject;
 @HideInInspector
 var targetXRotation : float;
 @HideInInspector
 var targetYRotation : float;
 @HideInInspector
 var targetXRotationV : float;
 @HideInInspector
 var targetYRotationV : float;
 
 var rotateSpeed : float = 0.3;
 
 var holdHeight : float = -0.5;
 var holdSide : float = 0.5;  
 
 
 function Update () 
 {
     transform.position = cameraObject.transform.position + (Quaternion.Euler(0,targetYRotation,0) * Vector3(holdSide, holdHeight, 0));
     
     targetXRotation = Mathf.SmoothDamp( targetXRotation, cameraObject.GetComponant(MouseLookScript).xRotation, targetXRotationV, rotateSpeed);
     targetYRotation = Mathf.SmoothDamp( targetYRotation, cameraObject.GetComponant(MouseLookScript).yRotation, targetYRotationV, rotateSpeed);
     
     transform.rotation = Quaternion.Euler(targetXRotation, targetYRotation, 0);
 }

The script seems to work because my gun follows the mouse in-game, but i get this error multiple times in my console when i play.

 MissingMethodException: Method not found: 'UnityEngine.GameObject.GetComponant'.
 Boo.Lang.Runtime.DynamicDispatching.MethodDispatcherFactory.ProduceExtensionDispatcher ()
 Boo.Lang.Runtime.DynamicDispatching.MethodDispatcherFactory.Create ()
 Boo.Lang.Runtime.RuntimeServices.DoCreateMethodDispatcher (System.Object target, System.Type targetType, System.String name, System.Object[] args)
 Boo.Lang.Runtime.RuntimeServices.CreateMethodDispatcher (System.Object target, System.String name, System.Object[] args)
 Boo.Lang.Runtime.RuntimeServices+<Invoke>c__AnonStorey12.<>m__6 ()
 Boo.Lang.Runtime.DynamicDispatching.DispatcherCache.Get (Boo.Lang.Runtime.DynamicDispatching.DispatcherKey key,

If anyone needs more evidence to help fix this then ask and I will post. Please answer ASAP!