Did a quick check, even with both main game download versions ("normal" and compressed), and at first sight both worked for me. But then I looked - according your error log - into the U1.rpy, and there is indeed the variable "Cbf" defaultet twice. So I asume you have activated the developer mode in Ren'Py or something ("unren-dev.rpy"), because then it checks that and there is the crash. If you start the game without that all works fine...
I'll do a Mod update/patch later and remove that little issue in this file U1.rpy, than the problem should be solved even for the dev. mode.