Don't ever apologies for providing advice, that after all is why we are all here and the great thing about advice is that the user can choose what to do with it. In this case I shall be applying it to the letter.
@pichalite I'm using the latest NodeBB v0.9.3.
I have managed to find a fix by another user: https://github.com/neutrino84/nodebb-plugin-category-sections/commit/ce3ba115a3e6f49912f9a79be415409c73b377a2
This seems to work without issue.