Unity console gives me various errors when I try to solve Unexpected symbol `end-of-file'

Well,

I was watching a YouTube tutorial of making interactable doors, and I write a script based on it, however, the script always give me the error ''Opener.cs(72,247): error CS1525: Unexpected symbol `end-of-file'''.... I was searching throught the internet and I found that this problem was caused by a missing bracket }....

Buuut, the problem is when I try to solve it ( I honestly don't know if the ''end of file problem'' solves when I do it ) Unity console gives me errors of basically the entire script, and when I remove the final bracket ( or at least I think is that...) Unity console just detect the ''end-of-file'' problem...

This is the script :

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Opener : MonoBehaviour 
 
 {
 
     public GameObject OpenPanel = null;
 
     private bool _isInsideTrigger = false;
 
     public Animator _animator;
 
     public string OpenText = "SampleText";
 
     public string CloseText = "SampleText";
 
     private bool _isOpen = false;
 
     
     void onTriggerEnter (Collider other)
     {
         if (other.tag == "Player") 
         {
             _isInsideTrigger = true;
             OpenPanel.SetActive(true);
             UpdatePanelText();
         }    
     
     }
 
     void OnTriggerExit (Collider other)
     {
         _isInsideTrigger = false;
         OpenPanel.SetActive (false);
     }
         
      private bool IsOpenPanelActive
 {
     get
     {
         return OpenPanel.activeInHierarchy;
     }
 }
 
 private void UpdatePanelText ()
 
 {
     Text panelText = OpenPanel.transform.FindChild("Text").GetComponent<Text>();
     if(panelText != null)
     {
         panelText.text = _IsOpen ? CloseText : OpenText; 
     }
 }
 
     //Update is called once per frame
     void Update()
     {
         if (IsOpenPanelActive && _IsInsideTrigger) 
         {
             if (Input.GetKeyDown (KeyCode.E)) 
             {
                 //Toggle Open State
                 _isOpen = !_IsOpen;
 
                 Invoke ("UpdatePanelText", 1.0f);
 
                 _animator.SetBool ("open", _IsOpen);
             }
         }
     }