Unity 2018.4.25f1 Errors – error CS0118 & error CS0234

I am getting 2 errors in my c# script.

1. Assets\scripts\playerMovement.cs(8,5): error CS0118: 'PlayerControls' is a namespace but is used like a type
2. Assets\scripts\playerMovement.cs(4,19): error CS0234: The type or namespace name 'InputSystem' does not exist in the namespace 'UnityEngine' (are you missing an assembly reference?)

playerMovement.cs:

using System.Collections; using System.Collections.Generic; using UnityEngine; using UnityEngine.InputSystem;  public class playerMovement : MonoBehaviour {     PlayerControls controls;     Vector2 move;     void Awake()     {         controls = new PlayerControls();          controls.Gameplay.move.performed += ctx => move = ctx.ReadValue<Vector2>();         controls.Gameplay.move.canceled += ctx => move = Vector2.zero;     }     void Update()     {         Vector2 m = new Vector2(move.x, move.y) * Time.deltaTime;         transform.Translate(m, Space.World);     } } 

I am using the new Input System 0.2.1 in unity 2018.4.25f.

The PlayerControls script is auto-generated from an Actions Input object, and it is in the main root "Assets".