It’d depend on what the issue is. You could have a single version of the mod when you join singleplayer, automatically download a different version when you join multiplayer, and then have not played singleplayer again while both mods were installed.
You can always view the mods currently installed from either:
- The in-game mod menu, which is were you’ve enabled/disabled mods from previously.
- Your mods folder:
...\Steam\steamapps\workshop\content\304930
I didn’t have an issue running a mod with the same contents on my own server – I can see all/most of the modded crafting recipes fine. Do the other mods installed on your server work? You may consider just trying from a clean state by uninstalling all of your current mods + clearing out your server folder.
It doesn’t look like having set a list of allowed IPs for your mod should be causing issues, but you may consider trying again without it.