Fatal error: Uncaught Error: Interface "Symfony\Component\Debug\FatalErrorHandler\FatalErrorHandlerInterface" not found in /home3/retainin/public_html/updates/concrete5.7.5.8_remote_updater/concrete/vendor/symfony/debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php:22 Stack trace: #0 {main} thrown in /home3/retainin/public_html/updates/concrete5.7.5.8_remote_updater/concrete/vendor/symfony/debug/FatalErrorHandler/UndefinedMethodFatalErrorHandler.php on line 22