Board Thread:Support Requests - Getting Started/@comment-27721133-20200512143125/@comment-9605025-20200515163304

It looks like you also still need to import the script. To summarize, using this script while restricting its use to admins and content mods requires two separate steps. Both steps are required in order for the script to work as desired.
 * 1) On MediaWiki:ImportJS, place a new line with the following content
 * dev:MassCategorization/code.js
 * 1) On MediaWiki:Wikia.js, place a new line at the end with the following content
 * window.MassCategorizationGroups = ['sysop', 'content-moderator'];
 * 1) *Note how there is no  in this bit.