CSS Async Loading

I have applied the patch and I have encountered an error when switching the attachment strategy in the form.

The AJAX call fails with the following stacktrace:

Auf der Website ist ein unerwarteter Fehler aufgetreten. Versuchen Sie es später noch einmal.

Error: Typed property Drupal\tone\Plugin\ToneAttachmentStrategy\CssPublicFiles::$loadAsync must not be accessed before initialization in Drupal\tone\Plugin\ToneAttachmentStrategy\CssPublicFiles->buildConfigurationForm() (line 183 of modules/contrib/tone/src/Plugin/ToneAttachmentStrategy/CssPublicFiles.php).

Drupal\tone\Form\ToneTypeForm->form() (Line: 107)
Drupal\Core\Entity\EntityForm->buildForm()
call_user_func_array() (Line: 536)
Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 375)
Drupal\Core\Form\FormBuilder->rebuildForm() (Line: 633)
Drupal\Core\Form\FormBuilder->processForm() (Line: 326)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 73)
Drupal\Core\Controller\FormController->getContentResult() (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 54)
...

I have changed the declaration of $loadAync to protected bool $loadAsync = FALSE;, and it seems to fix the issue.

Thanks! Good find, that's probably an issue when operating on a preexisting entity.

Automatically closed - issue fixed for 2 weeks with no activity.