route cannot be found while reverse-routing.

You have no admin/cat/edit/ route did you mean 'cat/edit/'.$id

the route is in a route group...

PHP Code:

// Admin routes
$routes->group("admin", ["filter" => "auth"], function ($routes) {
    $routes->get("/", "home::index");
    $routes->get('listusers', 'User::list', ['filter' => 'auth']);
    $routes->get('viewuser', 'User::view', ['filter' => 'auth']);

    //Kategorier
    $routes->get('cat/list', 'CatController::index');
    $routes->get('cat/create', 'CatController::create');
    $routes->post('cat/store', 'CatController::store');
    $routes->get('cat/edit/(:num)', 'CatController::edit/$1');
    $routes->post('cat/update/(:num)', 'CatController::update/$1');
    $routes->get('cat/delete/(:num)', 'CatController::delete/$1'); 


When typing the adress: localhost/admin/cat/edit/1 it works fine. Its just when i try to edit and it fails on validation i get this error.
If i try to create a new using admin/cat/create it works fine... so the code below works fine...

PHP Code:

       ## Validation
           $input = $this->validate([
              'kategori' => 'required|min_length[3]|is_unique[kategori.kategori]',
           ],
           [ // ERRORS
               'kategori' => [    'min_length' => 'Kategori må inneholde minst 3 bokstaver',
                                   'is_unique' => 'Denne kategorien finnes allerede']
            ]);
  
           if (!$input) {
              return redirect()->route('admin/cat/create')->withInput()->with('validation',$this->validator); 
           } else {