MW JS mw.Api.plugin.parse not loaded
Server Environment(Choose one or more): Production
URL: https://doc.wikimedia.org/mediawiki-core/REL1_31/js/#!/api/mw.Api.plugin.parse
Detailed Reproduction Steps: The parse functionality of the MW JavaScript API is not loaded on Gamepedia wikis. The script is at https://doc.wikimedia.org/mediawiki-core/REL1_31/js/source/parse.html and is part of base MediaWiki.
The effect of this may be seen by pasting new mw.Api().parse("[[test]]").done(function(data){console.log(data);});
in the browser's developer console, comparing the results at mediawiki.org with a GP wiki.
Without the plugin script loaded:
With the plugin script loaded:
The effect is also noticed when a user tries to show the preview of an AbuseFilter warning message, e.g, clicking "Show/Hide preview of selected message" on https://hydra.gamepedia.com/Special:AbuseFilter/3 does nothing except show the error message in the developer console.