Making Enemy Chase Closest Player (MultiPlayer)

Unity Engine
1

I have a Script to make an enemy chase a player… it works in single player but now that I added multiplayer I cant get it to work. How can I make the Zombie find the closest player Transform and get him to start chasing?

This is what I have now…

using UnityEngine;
using System.Collections;

public class AI : MonoBehaviour {

    public Transform target;
    public int Maxdistance;
    public int MoveSpeed = 5;
    public int RotationSpeed = 3;
   
    private Transform mytransform;

    void Awake ()
    {
        mytransform = transform;
    }
   
    void Start()
    {
        GameObject go = GameObject.FindGameObjectWithTag("Player");
        target = go.transform;
        Maxdistance = 2;
    }
   
    // Update is called once per frame
    void Update ()
    {
        Debug.DrawLine(mytransform.position,target.position,Color.yellow);
       
        mytransform.rotation = Quaternion.Slerp(mytransform.rotation,Quaternion.LookRotation(target.position - mytransform.position),RotationSpeed * Time.deltaTime);
       
        if (Vector3.Distance(target.transform.position, mytransform.position) > Maxdistance)
        {
            mytransform.position += mytransform.forward * MoveSpeed * Time.deltaTime;
        }   
    }
}

I will worry about the attacking once I get this part figured out(if your wondering)

2

After going over it I realized That the Start() function needed to be in the Update() function so It will continue to look for a new Transform, rather than only looking for one at the start of the game…

About to do some tests to see if it will actually switch between players

So I deleted the Start function and just added the lines to the update like this

using UnityEngine;
using System.Collections;

public class AI : MonoBehaviour {

    public Transform target;         // Your Player
    public float Maxdistance = 2;          // Distance Enemy stops from player
    public int MoveSpeed = 5;        // How fast The Enemy will move
    public int RotationSpeed = 3;    // How fast The Enemy will rotate
   
    private Transform mytransform;

    void Awake ()
    {
        mytransform = transform; 
    }

    void Update ()
    {
        GameObject go = GameObject.FindGameObjectWithTag("Player");
        target = go.transform;

        Debug.DrawLine(mytransform.position,target.position,Color.yellow);
       
        mytransform.rotation = Quaternion.Slerp(mytransform.rotation,Quaternion.LookRotation(target.position - mytransform.position),RotationSpeed * Time.deltaTime);
       
        if (Vector3.Distance(target.transform.position, mytransform.position) > Maxdistance)
        {
            mytransform.position += mytransform.forward * MoveSpeed * Time.deltaTime;
        }   
    }
}
3

OK after Testing, The enemy is in the game when one player spawns, but if a second player spawns the zombie disapeers… im guessing because the zombie has two players to pick from and cannoth pick so it just destroys itself?

ANY help is appreciated! thanks