Parameter colorTransform must be non-null.

So i have this error when debugging:

TypeError: Error #2007: Parameter colorTransform must be non-null.
    at flash.geom::Transform/set colorTransform()
    at Square2/changeParameters()
    at Square2/fadeOut()
    at Game/timerListener2()
    at flash.utils::Timer/_timerDispatch()
    at flash.utils::Timer/tick()

It shows this when debugging, and on my computer I can click "dismiss all" and it will work fine, but I do not have this option when debugging on my Android device. So I need someone to tell me how to "Un-null" my parameter, here is my code:

package 
{
    import GlobalVar;
    import flash.geom.ColorTransform;
    import flash.display.MovieClip;
    public class Square2 extends MovieClip
    {
        public var shouldFade = GlobalVar.vars.shouldFade
        public function Square2()
        {
            
            trace("square2");
            x = GlobalVar.vars.x;
            y = GlobalVar.vars.y;
            height = GlobalVar.vars.height;
            width = height;
        }
        public function changeParameters():void
        {
            transform.colorTransform = GlobalVar.vars.myColor
        }
        public function fadeOut ():void
        {
            
            alpha =  alpha*.8 
            
            trace(GlobalVar.vars.shouldFade)
            if (alpha < .2){x = GlobalVar.vars.x; y = GlobalVar.vars.y; height = GlobalVar.vars.height; width = height; changeParameters() ;alpha = 1; GlobalVar.vars.shouldFade = "false"}
            
            trace(alpha)
            
            
        }
    }
}