Fatal error: Uncaught Error: Class "JsonSchema\Constraints\Constraint" not found in /var/www/crm_killing_ninja/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/TypeConstraint.php:22 Stack trace: #0 {main} thrown in /var/www/crm_killing_ninja/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/TypeConstraint.php on line 22