JAVASCRIPT

419 Laravel

Check @csrf need to be in <form>

413 error laravel

// Need to increase or set client_max_body_size in your nginx config file. 
http {
    #...
        client_max_body_size 100m;
    #...
}
// Restart nginx

how create page 419 in laravel

There is a way to override this view. All you need to do is 
create 419.blade.php file inside the resources/views/errors folder.

If you need to find the Laravel`s default 419.blade.php file , you can publish
  vendor files:

php artisan vendor:publish --tag=laravel-errors