There's no mods.d directory!
This page describes what the mods.d directory is and how to solve this problem!
The solution is to create a directory mods.d: Please go into your Sword directory and type "mkdir mods.d" to create the directory. Now copy the config files of your modules into this package and remove (if they exist) the file mods.conf which isn't required any more. The mods.d directory replaced this file.