Duplicator does not work

Whenever I want to save ANYTHING duped and press Save Dupe, it pops the thumbnail for the creation for a split second and then just does not save (Or appears as a blank dupe, possibly from earlier).
I need to save a PvP overpowered sniper nest, and only Advanced Duplicator works.

A quick solution would be that I get it into a server with AdvDupe, someone dupes it and publishes it so i can add it to my subscribed dupes. I guess.

Edit: The whole Dupes section refuses to load (As in no actual creations can be loaded).

I got the game on Steam.

Workshop is down