Something goes wrong with Steam Workshop and updates are not downloaded automatically. Go to Properties/Installed Files and click "Verify integrity of game files" on Steam.
There are mods with repeated "ID". Find and delete the one of repeated mods.
Try to update NML manually, and delete folder GAMEPATH/worldbox_Data/StreamingAssets/mods/NML
NML installed with NCMS
NML gives up loading mods under "GAMEPATH/Mods" when NCMS exists.