Fatal error: Uncaught Error: Interface 'JsonSerializable' not found in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Fusion/Classes/FusionObjects/Helpers/LazyProps.php:11 Stack trace: #0 {main} thrown in /var/www/vhosts/www.thomas-bartholomaeus.de/content/neoscms/Packages/Application/Neos.Fusion/Classes/FusionObjects/Helpers/LazyProps.php on line 11