Fatal error: Uncaught Error: Class 'Doctrine\Common\EventArgs' not found in /home/app/htdocs/ninja/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Event/ManagerEventArgs.php:33
Stack trace:
#0 {main}
thrown in /home/app/htdocs/ninja/vendor/doctrine/common/lib/Doctrine/Common/Persistence/Event/ManagerEventArgs.php on line 33