Ahh nevermind then mate, seems to be an issue with the workshop, nothing new there. Only other alternative is to delete local files and reinstall game and make any amendments again to inc and edt folders again and re-subscribe to everything. If you do that make sure to move saved game, shortlists, tactics to desktop and drop them back in folders after clean install.
Bit excessive for one player but it's something that would bug the **** out of me knowing he wasn't in the game haha
The subscription service for mods on steam is a buggy, irrational piece of ****. I say this as an immense Valve fanboy, that's how bad it is. Every so often it will unrecognise half of my Civ V mods and force to DL the entire lot again.
Having said that, you never need to do a soft reinstall to get mods to work.