Fatal error: Uncaught Error: Class 'JsonSchema\Constraints\BaseConstraint' not found in /home/clienti2020/public_html/novaballet.it/vendor/justinrainbow/json-schema/src/JsonSchema/Validator.php:23 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/justinrainbow/json-schema/src/JsonSchema/Validator.php on line 23