Fatal error: Uncaught Error: Class "MediaWiki\Api\ApiBase" not found in /usr/www/otte/public/sphunt1/extensions/DiscussionTools/includes/ApiDiscussionToolsPreview.php:18 Stack trace: #0 {main} thrown in /usr/www/otte/public/sphunt1/extensions/DiscussionTools/includes/ApiDiscussionToolsPreview.php on line 18