Exception on saving order entity form display

Problem/Motivation

Due to the changes in Visible components (fields, extra fields) in Entity Display config entities store their region, when saving the entity form display form for commerce orders the following exception occurs:

The website encountered an unexpected error. Please try again later.

Drupal\Component\Plugin\Exception\PluginNotFoundException: The "hidden" plugin does not exist.

Steps to reproduce

1. Go to /admin/commerce/config/order-types/default/edit/form-display
2. Hit the save button

Proposed resolution

As per the change request, in the weight field definition change

->setDisplayOptions('form', [
  'type' => 'hidden',
])

->setDisplayOptions('form', [
  'region' => 'hidden',
])