为什么我会收到错误 CS1503 无法从“UnityEngine.Vector2”转换为“float”？

Question

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    private Rigidbody2D playerRB;
    // Movement Speed and Input Variable
    public float speed = 10f;
    private float horizontalInput;
    // Jump Strength and ground check 
    public Vector2 jumpHeight;
    public bool isOnGround = true;
    // Max numbers of jumps
    public int maxJumps = 2;
    public int Jumps;

    // Start is called before the first frame update
    void Start()
    {
        playerRB = GetComponent<Rigidbody2D>();

    }

    // Update is called once per frame
    void Update()
    {
        horizontalInput = Input.GetAxis("Horizontal");

        transform.Translate(Vector2.right * Time.deltaTime * speed * horizontalInput);

        if(Input.GetKeyDown(KeyCode.Space) && isOnGround)
        {
            playerRB.AddForce(jumpHeight, ForceMode2D.Impulse);
            isOnGround= false;
            this.Jump();
        }
    }

    private void Jump()
    {
        if (Jumps > 0)
        {
            playerRB.AddForce(new Vector2(0f, jumpHeight), ForceMode2D.Impulse);
            isOnGround = false;
            Jumps = Jumps - 1;
        }
        if (Jumps == 0)
        {
            return;
        }
    }

    private void OnCollisionEnter2D(Collision2D collision)
    {
        if (collision.gameObject.CompareTag("Ground"))
        {
            Jumps = maxJumps;
            isOnGround = true;
        }
    }

}

我还是 Unity 和 C# 的新手。我想让我的角色在 2d 环境中使用这个脚本进行双跳。但是我得到的是“错误 CS1503 无法将 UnityEngine.Vector2 形式转换为浮点数？”我将如何解决这个问题？并防止它在未来发生。