Unable to use campaign characters in custom modded game?

Long story short, I was interested in the GRIMMEST mod… So, I followed the guide under the modding sub section and also followed a youtube video by Depravity, which simplistically stated what one should do step by step. However, for whatever reason, I am still unable to get my characters to show up under custom games. Would any of this perhaps have to do with previously having steam cloud enabled? Is there any work-around of sorts if so, or am I making some very basic error? Sorry for not being more informative, but I basically followed all the steps in the video.

I am hoping somebody can help me out, so I can get some extra spawn action on tomorrow. Logging for the night, thanks :smiley: