UnitySteer - Problem creating Vector3Pathway

I started taking a look at UnitySteer. Basically I have a few waypoints in my scene, and I'm trying to assign that list of Vector3's to the C5.IList that the Vector3Pathway constructor requires.

How do I convert from a List to C5.IList ?? No matter what I try it doesn't accept the conversion, and using Path.AddPoint doesn't seem to work either using the default constructor.

When trying to convert, Unity gives me the error, 'Cannot convert from the source type to the destination type'.

Here is my code

     public void Awake()
     {
         var vector3List = GetVectors();
         Path = new Vector3Pathway((C5.IList<Vector3>)vector3List, 5, true);
     }
 
     private IList<Vector3> GetVectors()
     {
         wayPoints = wayPointContainer.GetComponentsInChildren<Transform>();
         var vector3List = new List<Vector3>();
 
         foreach (Transform theTransform in wayPoints)
         {
             vector3List.Add(new Vector3(theTransform.position.x, theTransform.position.y, theTransform.position.z));
         }
 
         return vector3List;
     }