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Error: Call to a member function access() on null in book_node_view() (line 233 of core/modules/book/book.module).
book_node_view() call_user_func_array() (Line: 426) Drupal\Core\Extension\ModuleHandler->Drupal\Core\Extension\{closure}() (Line: 405) Drupal\Core\Extension\ModuleHandler->invokeAllWith() (Line: 433) Drupal\Core\Extension\ModuleHandler->invokeAll() (Line: 288) Drupal\Core\Entity\EntityViewBuilder->buildMultiple() (Line: 239) Drupal\Core\Entity\EntityViewBuilder->build() call_user_func_array() (Line: 101) Drupal\Core\Render\Renderer->doTrustedCallback() (Line: 788) Drupal\Core\Render\Renderer->doCallback() (Line: 374) Drupal\Core\Render\Renderer->doRender() (Line: 204) Drupal\Core\Render\Renderer->render() (Line: 242) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 580) Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 243) Drupal\Core\Render\MainContent\HtmlRenderer->prepare() (Line: 132) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse() (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray() call_user_func() (Line: 142) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch() (Line: 174) 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: 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: 23) Stack\StackedHttpKernel->handle() (Line: 718) Drupal\Core\DrupalKernel->handle() (Line: 19)