Why am I getting the error "event.addEventListener is not a function"? This is my code in actions for Adobe Animate. There is a symbol instance called container.var root = this;var container;function main(){root.stop();container = root.container;container.mouseChildren = true;container.hitArea = new createjs.Shape(new createjs.Graphics().f("#000").dr(0,0,960,540));container.cache(0,0,960,540);stage.addChild(container);container.on("mousedown", mousePressed);createjs.Ticker.addEventListener("tick", stage);var drawing = new createjs.Shape();container.addChild(drawing);} var lastPoint = new createjs.Point();function mousePressed(event){lastPoint.x = event.stageX;lastPoint.y = event.stageY;event.addEventListener("mousemove", function(event){drawing.graphics.ss(20, "round").s("#ff0000");drawing.graphics.mt(lastPoint.x, lastPoint.y);drawing.graphics.lt(event.stageX, event.stageY);lastPoint.x = event.stageX;lastPoint.y = event.stageY;var erase = document.getElementById("toggle").checked;container.updateCache(erase?"destination-out":"source-over");drawing.gr