Fatal error: Uncaught Error: Interface 'SMW\Constraint\Constraint' not found in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Constraint/Constraints/NonNegativeIntegerConstraint.php:17 Stack trace: #0 {main} thrown in /home/mapeador/solecov2/w/extensions/SemanticMediaWiki/src/Constraint/Constraints/NonNegativeIntegerConstraint.php on line 17