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Error: Call to a member function getName() on null in Drupal\lang_dropdown\Form\LanguageDropdownForm->buildForm() (line 229 of modules/contrib/lang_dropdown/src/Form/LanguageDropdownForm.php).
Drupal\lang_dropdown\Form\LanguageDropdownForm->buildForm()
call_user_func_array() (Line: 536)
Drupal\Core\Form\FormBuilder->retrieveForm() (Line: 283)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 97)
Drupal\autosave_form\Form\AutosaveFormBuilder->buildForm() (Line: 224)
Drupal\Core\Form\FormBuilder->getForm() (Line: 762)
Drupal\lang_dropdown\Plugin\Block\LanguageDropdownBlock->build() (Line: 33)
Drupal\jango_shortcodes\Plugin\Shortcode\BlockShortcode->process() (Line: 438)
Drupal\shortcode\ShortcodeService->processTag() (Line: 315)
Drupal\shortcode\ShortcodeService->process() (Line: 78)
Drupal\shortcode\Plugin\Filter\Shortcode->process() (Line: 118)
Drupal\filter\Element\ProcessedText::preRenderText()
call_user_func_array() (Line: 101)
Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 813)
Drupal\Core\Render\Renderer->doCallback() (Line: 382)
Drupal\Core\Render\Renderer->doRender() (Line: 211)
Drupal\Core\Render\Renderer->render() (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 87)
__TwigTemplate_e818e6387b55ceb50a51eca8b8fde613->doDisplay() (Line: 405)
Twig\Template->displayWithErrorHandling() (Line: 378)
Twig\Template->display() (Line: 390)
Twig\Template->render() (Line: 55)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 457)
Drupal\Core\Render\Renderer->doRender() (Line: 470)
Drupal\Core\Render\Renderer->doRender() (Line: 211)
Drupal\Core\Render\Renderer->render() (Line: 479)
Drupal\Core\Template\TwigExtension->escapeFilter() (Line: 85)
__TwigTemplate_126d19d74364913f0256e48f1a197060->block_content() (Line: 182)
Twig\Template->displayBlock() (Line: 67)
__TwigTemplate_126d19d74364913f0256e48f1a197060->doDisplay() (Line: 405)
Twig\Template->displayWithErrorHandling() (Line: 378)
Twig\Template->display() (Line: 390)
Twig\Template->render() (Line: 55)
twig_render_template() (Line: 384)
Drupal\Core\Theme\ThemeManager->render() (Line: 457)
Drupal\Core\Render\Renderer->doRender() (Line: 211)
Drupal\Core\Render\Renderer->render() (Line: 167)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 605)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 168)
Drupal\Core\Render\Renderer->renderPlain() (Line: 182)
Drupal\Core\Render\Renderer->renderPlaceholder() (Line: 690)
Drupal\Core\Render\Renderer->replacePlaceholders() (Line: 574)
Drupal\Core\Render\Renderer->doRender() (Line: 211)
Drupal\Core\Render\Renderer->render() (Line: 155)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 605)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 156)
Drupal\Core\Render\Renderer->renderRoot() (Line: 278)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->renderPlaceholders() (Line: 127)
Drupal\Core\Render\HtmlResponseAttachmentsProcessor->processAttachments() (Line: 45)
Drupal\Core\EventSubscriber\HtmlResponseSubscriber->onRespond()
call_user_func() (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 202)
Symfony\Component\HttpKernel\HttpKernel->filterResponse() (Line: 190)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 81)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 50)
Drupal\ban\BanMiddleware->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23)
Stack\StackedHttpKernel->handle() (Line: 166)
Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->makeSubrequest() (Line: 119)
Drupal\Core\EventSubscriber\CustomPageExceptionHtmlSubscriber->makeSubrequestToCustomPath() (Line: 71)
Drupal\Core\EventSubscriber\CustomPageExceptionHtmlSubscriber->on403() (Line: 109)
Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException()
call_user_func() (Line: 142)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 229)
Symfony\Component\HttpKernel\HttpKernel->handleThrowable() (Line: 92)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 50)
Drupal\ban\BanMiddleware->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 23)
Stack\StackedHttpKernel->handle() (Line: 718)
Drupal\Core\DrupalKernel->handle() (Line: 19)