C# Instantiate not working after build "Android"

Hi everyone I'm making a small 2D game for mobile devices and i'm encountering a problem

I did search the forums for a solution to this I found out that others had the similar problem but I didn't find a solution.

What I want to do is when I kill a enemy, the enemy will drop (1) Coin. The code that i'm using works great on unity editor, but after I build it for Android, the enemies just wont die and drop the coin.

The problem is that with InstantiateCoin(); - Enemies won't even die. Without the code InstantiateCoin(); - Enemies die but of course Coin wont drop that way.

Any suggestions for another solution would be appreciated!

Thanks.

--- the code ---

 public void Hit(int _damage)
     {
         //Instantiate hit FX
         Instantiate(hitFX,transform.position,Quaternion.identity);
         //Remove the damage value from the health
         hp -= _damage;
         //If health is less than 0
         if (hp <= 0)
         {
         
             //Instantiate hit FX
             Instantiate(hitFX,transform.position,Quaternion.identity);
             //Instantiate dead FX
             Instantiate(dead,transform.position,Quaternion.identity);
             //Spawn Coin
             InstantiateCoin();
             //Destroy
             Destroy(gameObject);
 
 
         }
     }
 
     void InstantiateCoin()
     {
 
             //Spawn enemy
             Instantiate(Coin,transform.position,transform.rotation);
 
     }