Fatal error: Uncaught Error: Class 'SMW\Query\Language\Description' not found in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Query/Language/ConceptDescription.php:18 Stack trace: #0 {main} thrown in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Query/Language/ConceptDescription.php on line 18