Fatal error: Uncaught Error: Class 'SMW\Serializers\SemanticDataSerializer' not found in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Serializers/FlatSemanticDataSerializer.php:14 Stack trace: #0 {main} thrown in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Serializers/FlatSemanticDataSerializer.php on line 14