Fatal error: Uncaught TypeError: category::getCategoryHead(): Argument #1 ($id) must be of type int, string given, called in /home/klient.dhosting.pl/netwer/kolejnictwo/class/router.php on line 411 and defined in /home/klient.dhosting.pl/netwer/kolejnictwo/pages/category/class.php:49 Stack trace: #0 /home/klient.dhosting.pl/netwer/kolejnictwo/class/router.php(411): category::getCategoryHead('zwrotnicowe') #1 /home/klient.dhosting.pl/netwer/kolejnictwo/class/router.php(144): router::pagesInfrastructure(Array) #2 /home/klient.dhosting.pl/netwer/kolejnictwo/index.php(56): router::request('infrastruktura-...') #3 {main} thrown in /home/klient.dhosting.pl/netwer/kolejnictwo/pages/category/class.php on line 49