Problem/Motivation
I found this error on public facing page
Drupal\Component\Plugin\Exception\MissingValueContextException: Required contexts without a value: view_mode in Drupal\Core\Plugin\Context\ContextHandler->applyContextMapping() (line 150 of core/lib/Drupal/Core/Plugin/Context/ContextHandler.php).
Drupal\panels\Plugin\DisplayBuilder\StandardDisplayBuilder->buildRegions(Array, Array, '') (Line: 179)
Drupal\panels\Plugin\DisplayBuilder\StandardDisplayBuilder->build(Object) (Line: 338)
Drupal\panels\Plugin\DisplayVariant\PanelsDisplayVariant->build() (Line: 29)
Drupal\page_manager\Entity\PageVariantViewBuilder->view(Object, 'full') (Line: 134)
Drupal\Core\Entity\Controller\EntityViewController->view(Object, 'full')
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 580)
Drupal\Core\Render\Renderer->executeInRenderContext(Object, Object) (Line: 124)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 163)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 74)
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: 106)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 85)
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: 686)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
Steps to reproduce
Upgrade D9 to D10
Proposed resolution
Remaining tasks
User interface changes
API changes
Data model changes