Failed to load mods: Error in assignID: recipe-category with name 'metallurgy-or-assembling' does not exist.

Source: ddi-splitter-mk7 (recipe).

Says this error every time. I saw this was reported in the past, but it got locked without a clear answer You had asked if they had Space Age turned on, but Space Age is not listed as a required mod for this mod or I don't see what that has to do with this mod?

If it is a space age only mod, please update the required mods on it so people like me who don't want to do space age run ATM, know they can not use your mod.

Version 0.2.9 should now have this issue fixed

Thank you for taking the time to fix. It loaded into my game fine.
Aside from this mod and the Comfortable Loader mod, it is hard to find mods that add higher tiers of belts and loaders that work with them.

I have added a new mod https://mods.factorio.com/mod/more-belts-loaders that adds a tier of loader for each belt.