using ENUM class on Forms->Select Field return error

namespace App\Enums;

use Filament\Support\Contracts\HasLabel;

enum Durations: string implements HasLabel
{
  case OneDay = 'one_day';
  case TwoDays = 'two_days';
  case ThreeDays = 'three_days';
  case FourDays = 'four_days';

  public function getLabel(): ?string
  {

    return match ($this) {
      self::OneDay => 'Ein Tag',
      self::TwoDays => 'Zwei Tage',
      self::ThreeDays => 'Drei Tage',
      self::FourDays => 'Vier Tage',
    };
  }
}

'duration' => Durations::class,

Forms\Components\Select::make('duration')
                                    ->label('Dauer')
                                    ->options(Durations::class)
                                    ->required()
                                    ->reactive(),