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Error: Call to a member function get() on null in Drupal\sem_etab\Controller\GroupContenuCommunController->getTitle() (line 60 of modules/custom/sem_etab/src/Controller/GroupContenuCommunController.php).
call_user_func_array() (Line: 58) Drupal\Core\Controller\TitleResolver->getTitle() (Line: 880) token_tokens() call_user_func_array() (Line: 409) Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (Line: 388) Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 416) Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 364) Drupal\Core\Utility\Token->generate() (Line: 241) Drupal\Core\Utility\Token->doReplace() (Line: 191) Drupal\Core\Utility\Token->replace() (Line: 66) Drupal\metatag\MetatagToken->replace() (Line: 789) Drupal\metatag\MetatagManager->processTagValue() (Line: 628) Drupal\metatag\MetatagManager->generateRawElements() (Line: 564) Drupal\metatag\MetatagManager->generateElements() (Line: 504) metatag_get_tags_from_route() (Line: 131) metatag_page_attachments() (Line: 311) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 388) Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 312) Drupal\Core\Render\MainContent\HtmlRenderer->invokePageAttachmentHooks() (Line: 285) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 627) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 286) Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 128) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() call_user_func() (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 186) Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76) Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 58) Drupal\Core\StackMiddleware\Session->handle() (Line: 48) Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28) Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 191) Drupal\page_cache\StackMiddleware\PageCache->fetch() (Line: 128) Drupal\page_cache\StackMiddleware\PageCache->lookup() (Line: 82) Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 36) Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51) Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 704) Drupal\Core\DrupalKernel->handle() (Line: 19)