SupaCupa

So I've been trying to create a modpack which includes a few mods my brother's and I enjoy. I have been able to upload a file to dropbox, make the pack on technic.net and download it in the launcher. I can launch the game fine but it is as I try to make a new world that the game crashes and I can find the attached message in my crash-reports folder. crash-2015-12-06_14.32.06-client.txt