Problem/Motivation
Visiting uncached /ignite-irl page results in a "Deprecated function: unserialize(): Passing null to parameter #1 ($data) of type string is deprecated" notice.
Steps to reproduce
Fresh site installation of ignite_demo or clear cache and visit /ignite-irl.
Full output:
Deprecated function: unserialize(): Passing null to parameter #1 ($data) of type string is deprecated in Drupal\viewsreference\Plugin\Field\FieldFormatter\ViewsReferenceFieldFormatter->viewElements() (line 98 of modules/contrib/viewsreference/src/Plugin/Field/FieldFormatter/ViewsReferenceFieldFormatter.php).
Drupal\viewsreference\Plugin\Field\FieldFormatter\ViewsReferenceFieldFormatter->viewElements(Object, 'en') (Line: 89)
Drupal\Core\Field\FormatterBase->view(Object, 'en') (Line: 265)
Drupal\Core\Entity\Entity\EntityViewDisplay->buildMultiple(Array) (Line: 268)
Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay->buildMultiple(Array) (Line: 339)
Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'full') (Line: 281)
Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 36)
Drupal\block_content\BlockContentViewBuilder->viewMultiple(Array, 'full', NULL) (Line: 24)
Drupal\block_content\BlockContentViewBuilder->view(Object, 'full') (Line: 187)
Drupal\block_content\Plugin\Block\BlockContentBlock->build() (Line: 106)
Drupal\layout_builder\EventSubscriber\BlockComponentRenderArray->onBuildRender(Object, 'section_component.build.render_array', Object)
call_user_func(Array, Object, 'section_component.build.render_array', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'section_component.build.render_array') (Line: 90)
Drupal\layout_builder\SectionComponent->toRenderArray(Array, ) (Line: 88)
Drupal\layout_builder\Section->toRenderArray(Array) (Line: 318)
Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay->buildSections(Object) (Line: 277)
Drupal\layout_builder\Entity\LayoutBuilderEntityViewDisplay->buildMultiple(Array) (Line: 339)
Drupal\Core\Entity\EntityViewBuilder->buildComponents(Array, Array, Array, 'full') (Line: 24)
Drupal\node\NodeViewBuilder->buildComponents(Array, Array, Array, 'full') (Line: 281)
Drupal\Core\Entity\EntityViewBuilder->buildMultiple(Array) (Line: 238)
Drupal\Core\Entity\EntityViewBuilder->build(Array)
call_user_func_array(Array, Array) (Line: 111)
Drupal\Core\Render\Renderer->doTrustedCallback(Array, Array, 'Render #pre_render callbacks must be methods of a class that implements \Drupal\Core\Security\TrustedCallbackInterface or be an anonymous function. The callback was %s. See https://www.drupal.org/node/2966725', 'exception', 'Drupal\Core\Render\Element\RenderCallbackInterface') (Line: 797)
Drupal\Core\Render\Renderer->doCallback('#pre_render', Array, Array) (Line: 386)
Drupal\Core\Render\Renderer->doRender(Array, ) (Line: 204)
Drupal\Core\Render\Renderer->render(Array, ) (Line: 238)
Drupal\Core\Render\MainContent\HtmlRenderer->Drupal\Core\Render\MainContent\{closure}() (Line: 592)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 231)
Drupal\Core\Render\MainContent\HtmlRenderer->prepare(Array, Object, Object) (Line: 128)
Drupal\Core\Render\MainContent\HtmlRenderer->renderResponse(Array, Object, Object) (Line: 90)
Drupal\Core\EventSubscriber\MainContentViewSubscriber->onViewRenderArray(Object, 'kernel.view', Object)
call_user_func(Array, Object, 'kernel.view', Object) (Line: 111)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch(Object, 'kernel.view') (Line: 186)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 58)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 191)
Drupal\page_cache\StackMiddleware\PageCache->fetch(Object, 1, 1) (Line: 128)
Drupal\page_cache\StackMiddleware\PageCache->lookup(Object, 1, 1) (Line: 82)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle(Object, 1, 1) (Line: 704)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)