Fatal error: Uncaught TypeError: Unsupported operand types: string - int in /www/wwwroot/group_2.site/library/ContentHelper.php:19 Stack trace: #0 /www/wwwroot/group_2.site/src/Controller/Web/ContentController.php(25): Library\ContentHelper::render() #1 /www/wwwroot/group_2.site/config/boot.php(294): App\Controller\Web\ContentController->index() #2 /www/wwwroot/group_2.site/public/index.php(58): require('...') #3 {main} thrown in /www/wwwroot/group_2.site/library/ContentHelper.php on line 19