Fatal error: Uncaught TypeError: Models\User::GetSpecificUserById(): Argument #1 ($id) must be of type int, null given, called in /home/forum_gmo/forumgab.mycpnv.ch/controllers/ProfileController.php on line 19 and defined in /home/forum_gmo/forumgab.mycpnv.ch/models/User.php:33 Stack trace: #0 /home/forum_gmo/forumgab.mycpnv.ch/controllers/ProfileController.php(19): Models\User->GetSpecificUserById() #1 [internal function]: Controllers\ProfileController->show() #2 /home/forum_gmo/forumgab.mycpnv.ch/router/Router.php(25): call_user_func_array() #3 /home/forum_gmo/forumgab.mycpnv.ch/src/App.php(15): Router\Router->resolve() #4 /home/forum_gmo/forumgab.mycpnv.ch/public/index.php(49): Source\App->run() #5 {main} thrown in /home/forum_gmo/forumgab.mycpnv.ch/models/User.php on line 33