Validation doesn't work

If your validation fail and you want to return view with errors it will be better to use 

PHP Code:

// Controller:            
if (!$this->validate([
   'judul' => 'required|is_unique[comic.judul]',
])) {
   return view('comic/create', [
       'errors' => $this->validator->getErrors(),
   ]);
}

// View:

isset($errors['judul']) ? 'is-invalid' : '';