Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.RedirectHandler/Classes/RedirectInterface.php:19 Stack trace: #0 {main} thrown in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.RedirectHandler/Classes/RedirectInterface.php on line 19