Fatal error: Uncaught Error: Class 'ApiQueryBase' not found in /hermes/walnacweb03/walnacweb03ad/b924/moo.wesamuels/mediawiki/extensions/Gadgets/ApiQueryGadgetCategories.php:22 Stack trace: #0 {main} thrown in /hermes/walnacweb03/walnacweb03ad/b924/moo.wesamuels/mediawiki/extensions/Gadgets/ApiQueryGadgetCategories.php on line 22