Fatal error: Uncaught Error: Class 'ApiBase' not found in /var/www/html/wiki_2023/extensions/SemanticMediaWiki/src/MediaWiki/Api/BrowseBySubject.php:26 Stack trace: #0 {main} thrown in /var/www/html/wiki_2023/extensions/SemanticMediaWiki/src/MediaWiki/Api/BrowseBySubject.php on line 26