UNET - UI Not updating with Healthbar and other bars.

Hello,

So when I run the game, the Health and such will go down in the inspector, but it wont on the UI Healthbar, and the 2 other bars( thirst and food ). Is there an easy fix for this problem? Or does it involve a full remake of this script ( Singleplayer works fine, converting to Multiplayer).

All suggestions welcome, I'd happily try them out.

Thanks for reading.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 using UnityEngine.Networking;
 
 
 public class Player_Health : NetworkBehaviour
 {
 
 
     private GameManager_Master gameManagerMaster;
     private Player_Master playerMaster;
 
     
     public float playerHealth = 100f;
 
     public Text healthText;
     public GameObject deathCanvas;
 
     public float hunger = 100f;
     public float thirst = 100f;
 
     public Image hungerBar;
     public Image thirstBar;
     public Image healthBar;
 
     public float hungerSpeedMultiplier = 0.10f;
     public float thirstSpeedMultiplier = 0.25f;
     public float playerHealthSpeedMultiplier = 0.30f;
 
 
     private bool isDying = false;
 
     public Vector3 spawnPoint = Vector3.zero;
 
 
 
 
     void OnEnable()
     {
         SetInitialReferences();
         SetUI();
         playerMaster.EventPlayerHealthDeduction += DeductHealth;
         playerMaster.EventPlayerHealthIncrease += IncreaseHealth;
 
     }
 
     void OnDisable()
     {
         playerMaster.EventPlayerHealthDeduction -= DeductHealth;
         playerMaster.EventPlayerHealthIncrease -= IncreaseHealth;
     }
 
     void Start()
     {
         StartCoroutine(TestHealthDeduction()); //deathtest
         deathCanvas.SetActive(false);
 
 
     }
 
     private void Update()
     {
         
 
         CheckDeath();
         if (hunger > 0)
         {
             hunger -= Time.deltaTime * hungerSpeedMultiplier;
         }
 
         if (thirst > 0)
         {
             thirst -= Time.deltaTime * thirstSpeedMultiplier;
         }
 
         if (hunger <= 0 || thirst <= 0 || hunger <= 0)
         {
             isDying = true;
         }
 
         else
         {
             isDying = false;
         }
 
         if (isDying == true)
         {
             playerHealth -= Time.deltaTime * playerHealthSpeedMultiplier;
         }
 
         if(hunger > 100)
         {
             hunger = 100f;
         }
 
         if (thirst > 100)
         {
             thirst = 100f;
         }
 
 
         
 
         healthBar.fillAmount = playerHealth / 100;
         hungerBar.fillAmount = hunger / 100;
         thirstBar.fillAmount = thirst / 100;
        
     }
 
     private void CheckDeath()
     {
         if (playerHealth <= 0)
         {
             Die();
         }
 
     }
 
     void SetInitialReferences()
     {
         gameManagerMaster = GameObject.Find("Game.Manager").GetComponent<GameManager_Master>();
         playerMaster = GetComponent<Player_Master>();
     }
 
 
 
 
     IEnumerator TestHealthDeduction()
     {
         yield return new WaitForSeconds(2);
         DeductHealth(20); // Removes health *@**@*@*@**@*@*@*@
 
         yield return new WaitForSeconds(4);
         DeductHealth(20); // Removes health *@**@*@*@**@*@*@*@
     }
 
 
     void DeductHealth(int healthChange)
     {
         playerHealth -= healthChange;
 
         if(playerHealth <=0)
         {
             playerHealth = 0;
             Die();
         }
 
         SetUI();
     }
 
     private void Die()
     {
         deathCanvas.SetActive(true);
         gameObject.SetActive(false);
     }
 
     public void Respawn()
     {
         playerHealth = 100;
         hunger = 100;
         thirst = 100;
         deathCanvas.SetActive(false);
         transform.position = spawnPoint;
         gameObject.SetActive(true);
     }
 
     public void AddHunger(float amount)
     {
         hunger += amount;
     }
 
     public void AddThirst(float amount)
     {
         thirst += amount;
     }
 
 
 
 
     void IncreaseHealth(int healthChange)
     {
         playerHealth += healthChange;
 
         if(playerHealth > 100)
         {
             playerHealth = 100;
         }
 
 
         SetUI();
     }
 
     void SetUI()
     {
         if(healthText !=null)
         {
             healthText.text = playerHealth.ToString();
         }
 
     }
 
 
 
 
 }