Fatal error: Uncaught Error: Class 'Zend\Json\Exception\RuntimeException' not found in /home/app/htdocs/ninja/vendor/zendframework/zend-json/src/Server/Exception/RuntimeException.php:14 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/zendframework/zend-json/src/Server/Exception/RuntimeException.php on line 14