Error message
Warning: Undefined array key 0 in amp_entity_view_alter() (line 156 of modules/contrib/amp/amp.module).
amp_entity_view_alter(Array, Object, Object) (Line: 545) DrupalCoreExtensionModuleHandler->alter('node_view', Array, Object, Object) (Line: 304) DrupalCoreEntityEntityViewBuilder->buildMultiple(Array) (Line: 238) DrupalCoreEntityEntityViewBuilder->build(Array) call_user_func_array(Array, Array) (Line: 111) DrupalCoreRenderRenderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements DrupalCoreSecurityTrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'DrupalCoreRenderElementRenderCallbackInterface') (Line: 788) DrupalCoreRenderRenderer->doCallback('#pre_render', Array, Array) (Line: 377) DrupalCoreRenderRenderer->doRender(Array, ) (Line: 204) DrupalCoreRenderRenderer->render(Array, ) (Line: 238) DrupalCoreRenderMainContentHtmlRenderer->DrupalCoreRenderMainContent{closure}() (Line: 583) DrupalCoreRenderRenderer->executeInRenderContext(Object, Object) (Line: 239) DrupalCoreRenderMainContentHtmlRenderer->prepare(Array, Object, Object) (Line: 128) DrupalCoreRenderMainContentHtmlRenderer->renderResponse(Array, Object, Object) (Line: 90) DrupalCoreEventSubscriberMainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object) call_user_func(Array, Object, 'kernel.view', Object) (Line: 111) DrupalComponentEventDispatcherContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 187) SymfonyComponentHttpKernelHttpKernel->handleRaw(Object, 1) (Line: 76) SymfonyComponentHttpKernelHttpKernel->handle(Object, 1, 1) (Line: 58) DrupalCoreStackMiddlewareSession->handle(Object, 1, 1) (Line: 48) DrupalCoreStackMiddlewareKernelPreHandle->handle(Object, 1, 1) (Line: 191) Drupalpage_cacheStackMiddlewarePageCache->fetch(Object, 1, 1) (Line: 128) Drupalpage_cacheStackMiddlewarePageCache->lookup(Object, 1, 1) (Line: 82) Drupalpage_cacheStackMiddlewarePageCache->handle(Object, 1, 1) (Line: 48) DrupalCoreStackMiddlewareReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51) DrupalCoreStackMiddlewareNegotiationMiddleware->handle(Object, 1, 1) (Line: 51) DrupalCoreStackMiddlewareStackedHttpKernel->handle(Object, 1, 1) (Line: 704) DrupalCoreDrupalKernel->handle(Object) (Line: 18)