In unity what is C# jump script showing error

Question

On unity using C# I made this jump script to control a player. When I run the code below I get the errors shown below

using UnityEngine;

public class PlayerScript : MonoBehaviour
{
    public float JumpForce;

    [SerializeField]
    bool isGrounded = false;

    Rigidbody2D RB;

    private void Awake()
    {
        RB = GetComponent<Rigidbody2D();
    }

    // Update is called once per frame
    void Update()
    {
        if(Input.GetKeyDown(KeyCode.Space))
        {
            if(isGrounded == true)
            {
                RB.AddForce(Vector2.up*JumpForce);
                isGrounded = false;   
            }
        }
    }
    O refrences
    private void OnCollisionEnter2D(Collision2D collision)
    {
        if(collision.gameObject.CompareTag("ground"))
        {
            if(isGrounded == false)
            {
                isGrounded = true;
            }
        }
    }
}

For some reason, I get no error inside of vs code but when I to the game it says what the picture below says. If you have an answer it would really help thanks.

Answer 1

Make sure you have configured everything correctly. An in-depth tutorial can be found here.

https://code.visualstudio.com/docs/other/unity

The warnings can happen when you change the name of a class or file, and don't fix the script component on the scene game object. It can also give that warning if you change the code while in playmode.