unity 5.3 InvalidOperationException

hi, since i've upgraded to unity 5.3 i get this error: InvalidOperationException: Operation is not valid due to the current state of the object System.Collections.Generic.Stack`1[System.Boolean].Pop ()

in this case i was trying to attach the text in the hierarchy so that it could be displayed during the game. i don't know if it's relevant, anyway here's the script:

         public static int coins;
         public Text coinsText;
     void Update () {
             Move();
             Rotate ();
             Shoot ();
             UpdateText();
         }
     
    void UpdateText() {
                 coinsText.text = "Coins: " + coins.ToString();
             }

the scirpt is attached to the player, which is a prefab. can you help me solve this? thank you in advance:)