Warning: Undefined array key "#timezone" in Drupal\calendar_systems\Element\CalendarSystemsDateList::processDatelist() (line 100 of modules/contrib/calendar_systems/src/Element/CalendarSystemsDateList.php).
Drupal\calendar_systems\Element\CalendarSystemsDateList::processDatelist(Array, Object, Array)
call_user_func_array(Array, Array) (Line: 1013)
Drupal\Core\Form\FormBuilder->doBuildForm('webform_submission_membership_add_form', Array, Object) (Line: 1076)
Drupal\Core\Form\FormBuilder->doBuildForm('webform_submission_membership_add_form', Array, Object) (Line: 1076)
Drupal\Core\Form\FormBuilder->doBuildForm('webform_submission_membership_add_form', Array, Object) (Line: 1076)
Drupal\Core\Form\FormBuilder->doBuildForm('webform_submission_membership_add_form', Array, Object) (Line: 1076)
Drupal\Core\Form\FormBuilder->doBuildForm('webform_submission_membership_add_form', Array, Object) (Line: 579)
Drupal\Core\Form\FormBuilder->processForm('webform_submission_membership_add_form', Array, Object) (Line: 325)
Drupal\Core\Form\FormBuilder->buildForm(Object, Object) (Line: 48)
Drupal\Core\Entity\EntityFormBuilder->getForm(Object, 'add') (Line: 1257)
Drupal\webform\Entity\Webform->getSubmissionForm() (Line: 77)
Drupal\webform\Controller\WebformEntityController->addForm(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 627)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
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: 58)
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: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 50)
Drupal\ban\BanMiddleware->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: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
