Fatal error: Uncaught Error: Using $this when not in object context in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/views/mails/plaintext/default.php:1 Stack trace: #0 {main} thrown in /users/quirl/www/filemanager/spark/protected/humhub/modules/notification/views/mails/plaintext/default.php on line 1