You have to have unpack the BSA files for that various required mods so that the script source files are available.   One super oddity about the Papyrus compiler is that it doesn't link to compiled PEX files, it always requires the source PSC file instead.   EDIT: Added compiled pex file for those who are having trouble with the CK   EDIT AGAIN: Added source psc file just for completeness, surprised Goubo hasn't released an official patch yet. defeatplayer.pex defeatplayer.psc