Ошибка 500. Ошибка приложения

В файле: /var/www/x1db-php/webapps/pskovedu/controllers/DiscussionController.php:178

Трассировка:

#0 /var/www/x1db-php/library/X1/MVC/Control.php(98): Edu\DiscussionController->view()
#1 /var/www/x1db-php/library/X1/MVC/Control.php(66): X1\MVC\Control->tryAction('view')
#2 /var/www/x1db-php/library/X1/MVC/Controller.php(60): X1\MVC\Control->run(Object(X1\MVC\Request))
#3 /var/www/x1db-php/library/X1/MVC/Dispatcher.php(82): X1\MVC\Controller->run(Object(X1\MVC\Request))
#4 /var/www/x1db-php/library/X1/App/FrontController.php(275): X1\MVC\Dispatcher->dispatch()
#5 /var/www/x1db-php/public/index.php(38): X1\App\FrontController->run()
#6 {main}

Последний sql запрос:

select "ROLE_ACL"."RESOURCEFK","RIGHTS"."ID" from "ROLE_ACL"
			inner join "RIGHTS" on ("ROLE_ACL"."RIGHTFK" = "RIGHTS"."SYS_GUID" and mod(coalesce("RIGHTS"."SYS_STATE",0),2)=0)
            where   "ROLE_ACL"."ALLOW" = 1 and mod(coalesce("ROLE_ACL"."SYS_STATE",0),2)=0
            and "ROLE_ACL"."RESOURCEFK" in ('pages') and "ROLE_ACL"."SYS_GUIDFK" in ('readonly')