Fatal error: Uncaught Error: Class "JsonSchema\Constraints\Constraint" not found in /var/www/html/casavio-qa2.das24.it/httpdocs_old/laravel/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/StringConstraint.php:20 Stack trace: #0 {main} thrown in /var/www/html/casavio-qa2.das24.it/httpdocs_old/laravel/vendor/justinrainbow/json-schema/src/JsonSchema/Constraints/StringConstraint.php on line 20