Okay so i found a fix it seems.
Firstly i don't know if this will work for you as-well but try it out and see what happens.

Second.. here we go:
2) Uninstall Unturned
3) Navigate to steam/steamapps/ and delete the "Workshop" folder
4) Navigate to steam/steamapps/common/ and delete the "Unturned" folder
5) Exit steam completely and relaunch with admin rights(Right click steam and select run as admin)(Win7 AND UP! If you have an older OS i don't know what to say to you..)
6) Once steam has been launched navigate to steam/steamapps/workshop and copy/paste the 304930 folder to your desktop
7) Reinstall Unturned
8) Navigate to steam/steamapps/common/unturned/maps and copy/paste the CONTENTS(What ever is inside!) from desktop/304930/600803642 to your maps folder.
9) Launch unturned and the rest of the mods should sync up.

Unturned crashes:
Reinstall Unturned and relaunch steam after you've completed these steps.

@Neko-Chan (Try this out!)