That's definitely a new one, phaser (the game engine ) gets loaded through CDN (content delivery network) online. It's possible that when you tried to load it wasn't able to get the game engine file but I haven't seen that issue repeated here. I'll keep looking for it. Do you have any extensions enabled that disable external scripts? The modal error seems similar because that one comes from Bootstrap which is also pulled via CDN. So again seems like the external scripts files were not pulled when you tried to load in. In the next update I'll make sure to include local copies of those files to fix this.