error CS0131:

I have a big problem, I have sunken unity gives me this error
I can not find the solution anywhere??

Assets / _Scripts / Login.cs (14,14): error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer

I try to attach the script

[SUB]using System;
using System.Collections;
using ExitGames.Client.Photon;
using ExitGames.Client.Photon.Lite;
using UnityEngine;

public class Login : MonoBehaviour {
	
	PhotonServer _photonServer;
	bool _isConnected;
	// Use this for initialization
	void Start () {
	     Application.runInBackground = true;
	     PhotonServer = new PhotonServer();
	
	// Update is called once per frame
	void Update () {
	     try
		{
	if (_isConnected)
			{
		_photonServer.Update();	
		}
		}
		catch(Exception ex)
		{
			Debug.Log(ex);
		}
	}
	void OnApplicationQuit()
	{
	  try
		{
	    _photonServer.Disconnect();	
		
		}
		catch(Exception ex)
		{
			Debug.Log(ex);
		}	
	}
	void OnGui()
	{
		if (GUI.Button(new Rect(5,5,100,20), "Connect"))
		{
			PhotonPeer peer = new PhotonPeer(_photonServer, false);
			_photonServer.Init(peer, "Localhost:5055", "PhotonIntro");
			_isConnected = true;
		}
		GUI.Label(new Rect(5,30,100,20), _photonServer.Status);
	}
}[/SUB]

thanks for everything…

your vairable

PhotonServer = new PhotonServer()

at line 14 should be

_photonServer = new PhotonServer()

you were not declaring a variable and didnt have one a PhotonServer (variable) declared anywhere else.