Drupal 10.3 breaks DomainListBuilder

Changing issue priority to major, since i consider this to be an important enought issue.

Indeed that path is broken in 10.3.0

I have just noticed line 318 (the one that causes the error) is

    $form = $this->formBuilder()->getForm($this);

comparing the DraggableListBuilder class, in 10.2 there is available:

  /**
   * Returns the form builder.
   *
   * @return \Drupal\Core\Form\FormBuilderInterface
   *   The form builder.
   */
  protected function formBuilder() {
    if (!$this->formBuilder) {
      $this->formBuilder = \Drupal::formBuilder();
    }
    return $this->formBuilder;
  }

while in 10.3 that function it is not available anymore but it seems using $this->formBuilder is ok
So maybe having a code such as to maintain BC ??

    if (\version_compare(\Drupal::VERSION, '10.2.9999', '<')) {
      $form = $this->formBuilder()->getForm($this);
    }
    else {
      $form = $this->formBuilder->getForm($this);
    }

but i cannot check this right now in any 10.2.x or lower drupal site

i created an mr without the version constraint so people can use it as a fix in composer

testing in my local evironment with a D 10.2 version does also work with the patch so no version check needed...

Seems It has been already flagged under https://www.drupal.org/project/domain/issues/3450485 🐛 WSOD Undefined method Drupal\domain\DomainListBuilder::formBuilder Needs review

Merged in other linked issue.