Cubic bezier ease exporter from After Effects

cubicBezierExporter.jsx

var comp = app.project.activeItem;
var layer = comp.selectedLayers[0];
var numEffects = layer.Effects.numProperties;   

var slider;

for(var i = 1; i<=numEffects; i++){
            var effectLayer = layer.Effects.property(i);
            var matchName = effectLayer.matchName;
            if(matchName == "ADBE Slider Control"){
                slider = effectLayer;
                var prop = slider.property("Slider");
                var keyframeEaseoutA = prop.keyOutTemporalEase(1);
                var keyframeEaseinB = prop.keyInTemporalEase(2);

                var speedA = keyframeEaseoutA[0].speed;
                var speedB = keyframeEaseinB[0].speed;
                var influenceA = keyframeEaseoutA[0].influence;
                var influenceB = keyframeEaseinB[0].influence;
                
                var mX1 = influenceA/100;
                var mY1 = speedA*mX1;
                var mX2 = (-0.01*influenceB)+1;
                var mY2 = (speedB*(mX2-1))+1
                
                var cubicBezierParams = "("+mX1+","+mY1+","+mX2+","+mY2+")" ;
                
                alert("cubicBezierParams >> " + cubicBezierParams);
            }
 }

Hi,
I am trying to use your script to export easing to bezier curve. However, it seems to be failing at line 3. Would you be able to tell me what I am doing wrong? Would be great to get it working. I have attached a screen shot for reference.
Thanks, Jack