Fatal error: Uncaught Error: Class "Zend\Validator\AbstractValidator" not found in /home/mailtrim/public_html/vendor-backup/zendframework/zend-validator/src/IsInstanceOf.php:13 Stack trace: #0 {main} thrown in /home/mailtrim/public_html/vendor-backup/zendframework/zend-validator/src/IsInstanceOf.php on line 13