Fatal error: Uncaught Error: Class 'Zend\Validator\File\Hash' not found in /home/app/htdocs/ninja/vendor/zendframework/zend-validator/src/File/Sha1.php:17 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/zendframework/zend-validator/src/File/Sha1.php on line 17