Fatal error: Uncaught TypeError: Argument 1 passed to articles::show_article() must be an instance of models\Article, null given, called in /home/patrisgr/archive.patris.gr/home-site/home/httpd/html/patris/router.php on line 91 and defined in /home/patrisgr/archive.patris.gr/home-site/home/httpd/html/patris/router.php:94 Stack trace: #0 /home/patrisgr/archive.patris.gr/home-site/home/httpd/html/patris/router.php(91): articles->show_article(NULL) #1 /home/patrisgr/archive.patris.gr/home-site/home/httpd/html/patris/router.php(24): articles->fire(Array) #2 {main} thrown in /home/patrisgr/archive.patris.gr/home-site/home/httpd/html/patris/router.php on line 94