I posted on your steam thread which hopefully will answer some of your additional questions and help you with your conditions issue. Regarding that warning of invalid files in main and not being able to play multiplayer, that error is meaningless. Just make sure both you and your friend have the files. Now if you want to publish a mod to the workshop, you'll have to make a .pak with the editor. Have you set the Module Settings (under Modding tab at top) right? I think you have to set the "StartUp Level" to CharacterCreation and MenuLevel to "Menuscreen_Cyseal." I'm not sure if you can use the mod menu to activate a mod on an existing playthrough. The unpacked method of installing like with Scales lets you do that though.
The DescriptionRef/StatsDescriptionRef are just references, not actual data. The StatsDescription, and Description entries are the real entries, which you then have to translate with a Translated Key file.
This guide might be helpful regarding that and the process in general, also.
http://steamcommunity.com/sharedfiles/filedetails/?id=310635729
