Problem/Motivation
When I enable "Styles" in a CKEditor configuration I get a fatal error:
AssertionError: assert(NestedArray::keyExists($subform, $parts)) in assert() (line 886 of core/modules/ckeditor5/src/Plugin/Editor/CKEditor5.php).
Drupal\ckeditor5\Plugin\Editor\CKEditor5::mapViolationPropertyPathsToFormNames('settings.plugins.ckeditor5_style.styles', Array) (Line: 922)
Drupal\ckeditor5\Plugin\Editor\CKEditor5::mapPairViolationPropertyPathsToFormNames('settings.plugins.ckeditor5_style.styles', Array) (Line: 707)
Drupal\ckeditor5\Plugin\Editor\CKEditor5->validateConfigurationForm(Array, Object) (Line: 207)
editor_form_filter_admin_format_validate(Array, Object)
call_user_func_array('editor_form_filter_admin_format_validate', Array) (Line: 82)
Drupal\Core\Form\FormValidator->executeValidateHandlers(Array, Object) (Line: 274)
Drupal\Core\Form\FormValidator->doValidateForm(Array, Object, 'filter_format_edit_form') (Line: 118)
Drupal\Core\Form\FormValidator->validateForm('filter_format_edit_form', Array, Object) (Line: 593)
Drupal\Core\Form\FormBuilder->processForm('filter_format_edit_form', Array, Object) (Line: 326)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 73)
Drupal\Core\Controller\FormController->getContentResult(Object, Object) (Line: 39)
Drupal\layout_builder\Controller\LayoutBuilderHtmlEntityFormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 638)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 181)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 53)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle(Object, 1, 1) (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 36)
Drupal\Core\StackMiddleware\AjaxPageState->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 741)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
require('/Users/lluisandreu/Projects/drupal/miia-drupal/web/index.php') (Line: 48)
Steps to reproduce
Use "Basic HTML" text format with CKEditor 5.
Enable "Styles" dragging the button to the toolbar
Add any style, for example a.test|Test
Crash happens and I am unable to add styles.