Fatal error: Uncaught TypeError: Argument 1 passed to Modules\User\Mappers\User::getUserById() must be of the type int, null given, called in /var/www/vhosts/sg-elite.de/httpdocs/application/modules/forum/controllers/Showposts.php on line 121 and defined in /var/www/vhosts/sg-elite.de/httpdocs/application/modules/user/mappers/User.php:24 Stack trace: #0 /var/www/vhosts/sg-elite.de/httpdocs/application/modules/forum/controllers/Showposts.php(121): Modules\User\Mappers\User->getUserById() #1 /var/www/vhosts/sg-elite.de/httpdocs/application/libraries/Ilch/Page.php(243): Modules\Forum\Controllers\Showposts->indexAction() #2 /var/www/vhosts/sg-elite.de/httpdocs/application/libraries/Ilch/Page.php(137): Ilch\Page->loadController() #3 /var/www/vhosts/sg-elite.de/httpdocs/index.php(68): Ilch\Page->loadPage() #4 {main} thrown in /var/www/vhosts/sg-elite.de/httpdocs/application/modules/user/mappers/User.php on line 24