Fatal error: Could not check compatibility between SMW\MediaWiki\Search\ExtendedSearchEngine::getTextFromContent(Title $t, ?Content $c = null) and SearchEngine::getTextFromContent(MediaWiki\Title\Title $t, ?MediaWiki\Content\Content $c = null), because class Title is not available in /var/www/html/extensions/SemanticMediaWiki/src/MediaWiki/Search/ExtendedSearchEngine.php on line 141