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Error: Call to a member function get() on null in mod_node_preprocess_html() (line 72 of modules/custom/mod_node/mod_node.module).
mod_node_preprocess_html(Array, 'html', Array) (Line: 287) Drupal\Core\Theme\ThemeManager->render('html', Array) (Line: 435) Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 195) Drupal\Core\Render\Renderer->render(Array) (Line: 147) Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 574) Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 148) Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.view', Object) (Line: 149) Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 2) (Line: 64) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 2, 1) (Line: 57) Drupal\Core\StackMiddleware\Session->handle(Object, 2, 1) (Line: 47) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 2, 1) (Line: 99) Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 2, 1) (Line: 78) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 2, 1) (Line: 47) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 2, 1) (Line: 50) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 2, 1) (Line: 23) Stack\StackedHttpKernel->handle(Object, 2) (Line: 153) Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->makeSubrequest(Object, '/system/404', 404) (Line: 109) Drupal\Core\EventSubscriber\DefaultExceptionHtmlSubscriber->on404(Object) (Line: 98) Drupal\Core\EventSubscriber\HttpExceptionSubscriberBase->onException(Object, 'kernel.exception', Object) (Line: 111) Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('kernel.exception', Object) (Line: 221) Symfony\Component\HttpKernel\HttpKernel->handleException(Object, Object, 1) (Line: 75) Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57) Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47) Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 207) Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 121) Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 75) Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47) Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50) Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23) Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 652) Drupal\Core\DrupalKernel->handle(Object) (Line: 19)