Fatal error: Uncaught Error: Class "SMW\DataValues\BooleanValue" not found in /var/www/html/extensions/SemanticMediaWiki/src/DataValues/UniquenessConstraintValue.php:11 Stack trace: #0 {main} thrown in /var/www/html/extensions/SemanticMediaWiki/src/DataValues/UniquenessConstraintValue.php on line 11