I've downloaded babylon master js and stripped it from the dirs: tools and exporters. Uploaded it to my webserver. I'm currently using 1.13, but also other versions give the exact same error: Uncaught TypeError: Cannot read property 'push' of undefined (line 6) d.meshes.push(this) Following tut below: (copied tutorial files as provided, but dont work) https://github.com/BabylonJS/Babylon.js/wiki/02-Basic-elements Am I doing something wrong? I've been reading that some errors might be there due to an upgrade of version. Sorry for my poor language or newbie question, im just ager to start playing with Babylon