Hi, I'm having issues with everyone's favorite browser: I'm displaying Spine animations in Pixi - which works well except for in IE9. part of the code: PIXI.loader.add('animTest', 'libs/pixiSpine/animTest.json');PIXI.loader.load(function (loader, resources) {walker = new PIXI.spine.Spine(resources.animTest.spineData);}and on on IE9 I receive the following error: SCRIPT5022: The spineData param is required.If I log 'spineData' it's undefined. I've tried one or two polyfills (typedarray.js and es5.js) with no effect.. Since I'm new to web development, I've not sure how to figure out what IE is missing. Thanks!