So i have had an issue trying to figure out why the unsub button next to the mods in game was always not working, Its frustrating when you are building up GB's and can't get rid of these mods to make space for new ones, and I know quite a few other people are also confused about this so this is what you gotta do

Search up Mod.io on google or what ever and login with you're steam account, once you are logged in to Mod.io with your steam account you can go to your collection and you will see every mod you have subed to, just click the red X on the right side of the mod and boom its gone!

I hope this helps anyone confused with this issue!