Can't disable component, little checkbox is missing from inspector

Hi, newbie Unity user here. I don't know any C# so I'm quite lost on this one. I'm using a third person controller script and I want to disable it using my visual scripting plugin (Playmaker). However, it doesn't have the little checkbox to allow for disabling/enabling components like other components, which I assume is the problem.

Here is the code:

 using UnityEngine;
 
 namespace Invector.vCharacterController
 {
     public class vThirdPersonController : vThirdPersonAnimator
     {
         public virtual void ControlAnimatorRootMotion()
         {
             if (!this.enabled) return;
 
             if (inputSmooth == Vector3.zero)
             {
                 transform.position = animator.rootPosition;
                 transform.rotation = animator.rootRotation;
             }
 
             if (useRootMotion)
                 MoveCharacter(moveDirection);
         }
 
         public virtual void ControlLocomotionType()
         {
             if (lockMovement) return;
 
             if (locomotionType.Equals(LocomotionType.FreeWithStrafe) && !isStrafing || locomotionType.Equals(LocomotionType.OnlyFree))
             {
                 SetControllerMoveSpeed(freeSpeed);
                 SetAnimatorMoveSpeed(freeSpeed);
             }
             else if (locomotionType.Equals(LocomotionType.OnlyStrafe) || locomotionType.Equals(LocomotionType.FreeWithStrafe) && isStrafing)
             {
                 isStrafing = true;
                 SetControllerMoveSpeed(strafeSpeed);
                 SetAnimatorMoveSpeed(strafeSpeed);
             }
 
             if (!useRootMotion)
                 MoveCharacter(moveDirection);
         }
 
         public virtual void ControlRotationType()
         {
             if (lockRotation) return;
 
             bool validInput = input != Vector3.zero || (isStrafing ? strafeSpeed.rotateWithCamera : freeSpeed.rotateWithCamera);
 
             if (validInput)
             {
                 // calculate input smooth
                 inputSmooth = Vector3.Lerp(inputSmooth, input, (isStrafing ? strafeSpeed.movementSmooth : freeSpeed.movementSmooth) * Time.deltaTime);
 
                 Vector3 dir = (isStrafing && (!isSprinting || sprintOnlyFree == false) || (freeSpeed.rotateWithCamera && input == Vector3.zero)) && rotateTarget ? rotateTarget.forward : moveDirection;
                 RotateToDirection(dir);
             }
         }
 
         public virtual void UpdateMoveDirection(Transform referenceTransform = null)
         {
             if (input.magnitude <= 0.01)
             {
                 moveDirection = Vector3.Lerp(moveDirection, Vector3.zero, (isStrafing ? strafeSpeed.movementSmooth : freeSpeed.movementSmooth) * Time.deltaTime);
                 return;
             }
 
             if (referenceTransform && !rotateByWorld)
             {
                 //get the right-facing direction of the referenceTransform
                 var right = referenceTransform.right;
                 right.y = 0;
                 //get the forward direction relative to referenceTransform Right
                 var forward = Quaternion.AngleAxis(-90, Vector3.up) * right;
                 // determine the direction the player will face based on input and the referenceTransform's right and forward directions
                 moveDirection = (inputSmooth.x * right) + (inputSmooth.z * forward);
             }
             else
             {
                 moveDirection = new Vector3(inputSmooth.x, 0, inputSmooth.z);
             }
         }
 
         public virtual void Sprint(bool value)
         {
             var sprintConditions = (input.sqrMagnitude > 0.1f && isGrounded &&
                 !(isStrafing && !strafeSpeed.walkByDefault && (horizontalSpeed >= 0.5 || horizontalSpeed <= -0.5 || verticalSpeed <= 0.1f)));
 
             if (value && sprintConditions)
             {
                 if (input.sqrMagnitude > 0.1f)
                 {
                     if (isGrounded && useContinuousSprint)
                     {
                         isSprinting = !isSprinting;
                     }
                     else if (!isSprinting)
                     {
                         isSprinting = true;
                     }
                 }
                 else if (!useContinuousSprint && isSprinting)
                 {
                     isSprinting = false;
                 }
             }
             else if (isSprinting)
             {
                 isSprinting = false;
             }
         }
 
         public virtual void Strafe()
         {
             isStrafing = !isStrafing;
         }
 
         public virtual void Jump()
         {
             // trigger jump behaviour
             jumpCounter = jumpTimer;
             isJumping = true;
 
             // trigger jump animations
             if (input.sqrMagnitude < 0.1f)
                 animator.CrossFadeInFixedTime("Jump", 0.1f);
             else
                 animator.CrossFadeInFixedTime("JumpMove", .2f);
         }
     }
 }

I'm not really sure how to go about fixing this problem. If anyone has any answers, it'd be much appreciated. Thank you.