Fatal error: Uncaught Error: Using $this when not in object context in /home/eberhardschwarze/public_html/var/cache/prod/ContainerRjol8xm/getStateButtonCallbackListenerService.php:8 Stack trace: #0 {main} thrown in /home/eberhardschwarze/public_html/var/cache/prod/ContainerRjol8xm/getStateButtonCallbackListenerService.php on line 8