Question can't build my game

i have two scene and after try to build but can't . this two messages below showing

here two messages:
1
((
UnityException: GetAxis is not allowed to be called from a MonoBehaviour constructor (or instance field initializer), call it in Awake or Start instead. Called from MonoBehaviour 'Player1' on game object 'player-idle-1'.
See "Script Serialization" page in the Unity Manual for further details.
Player1..ctor () (at Assets/Scripts/Player1.cs:20)
))

2
((

UnityException: GetAxis is not allowed to be called from a MonoBehaviour constructor (or instance field initializer), call it in Awake or Start instead. Called from MonoBehaviour 'Player1'.
See "Script Serialization" page in the Unity Manual for further details.
Player1..ctor () (at Assets/Scripts/Player1.cs:20)

))





finally this my code below:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using System.Security.AccessControl;
4. using UnityEngine;
5.  
6. public class Player1 : MonoBehaviour
7. {
8.  
9.     [SerializeField]
10.     float speed = 0.03f;
11.     [SerializeField]
12.     float jump = 10f;
13.     bool JumpOnce;
14.     Animator anim;
15.     Transform myTransform;
16.     SpriteRenderer mySprite;
17.     Rigidbody2D rb;
18.     public bool onLadder = false;
19.     public float gravityScale = 5;
20.     float vDirection = Input.GetAxis("Vertical");
21.  
22.  
23.     // Start is called before the first frame update
24.     void Start()
25.     {
26.         myTransform = GetComponent<Transform>();
27.         mySprite = GetComponent<SpriteRenderer>();
28.         rb = GetComponent<Rigidbody2D>();
29.         anim = GetComponent<Animator>();
30.         vDirection = Input.GetAxis("Vertical");
31.     }
32.  
33.     // Update is called once per frame
34.     void Update()
35.     {
36.        
37.         float hDirection = Input.GetAxis("Horizontal");  
38.         if (hDirection > 0)
39.  
40.         {
41.             anim.SetBool("isRunning", true);
42.             transform.Translate(new Vector3(1 * speed, 0, 0));
43.             mySprite.flipX = false;
44.         }
45.  
46.         else if (hDirection < 0)
47.        
48.         {
49.             anim.SetBool("isRunning", true);
50.             transform.Translate(new Vector3(-1 * speed, 0, 0));
51.             mySprite.flipX = true;
52.         }
53.         else { anim.SetBool("isRunning", false);
54.         }
55.  
56.  
57.      
58.  
59.         if (Input.GetButtonDown("Jump") && JumpOnce == false)
60.         {
61.             rb.velocity = new Vector2(0, jump);
62.             JumpOnce = true;
63.             anim.SetTrigger("isJumping");
64.  
65.         }
66.  
67.         if (Mathf.Abs(rb.velocity.y) < 0.03f)
68.         {
69.             JumpOnce = false;
70.             anim.SetFloat("Speed", Mathf.Abs(rb.velocity.x));
71.         }
72.    
73.  
74.  
75.     }
76. }
77.  

 

The message is correct. Do what it says:

 

there was asset file inside project (not used) when delete it its work
Thank you Owen-Reynolds