MAMP - Apache/2.2.29 (Unix) - PHP/7.0.8 - MySQL 5.5.42
Drupal-8.3.2
Panels-8.x-4.1
Page Manager-8.x-4.0-beta2
ctools-8.x-3.0

UPDATE: seems, has to do with page_manager. I will create a new issue in page_manager, and refer also to this one.

Hello!
Would like to report, that on
pages / node_view
and for exp. selection criteria: entity_bundle:node Content type is article
and after adding, Main page content - (system_main_block) it causes error.
The website encountered an unexpected error. Please try again later.

I can add another elements without error.

best regards
S.

my log-Message

TypeError: Argument 1 passed to Drupal\Core\Render\Element::isEmpty() must be of the type array, null given, called in /Applications/MAMP/htdocs/cover3/modules/panels/src/Plugin/DisplayBuilder/StandardDisplayBuilder.php on line 136 in Drupal\Core\Render\Element::isEmpty() (line 198 of /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/Render/Element.php) #0 /Applications/MAMP/htdocs/cover3/modules/panels/src/Plugin/DisplayBuilder/StandardDisplayBuilder.php(136): Drupal\Core\Render\Element::isEmpty(NULL) #1 /Applications/MAMP/htdocs/cover3/modules/panels/src/Plugin/DisplayBuilder/StandardDisplayBuilder.php(162): Drupal\panels\Plugin\DisplayBuilder\StandardDisplayBuilder->buildRegions(Array, Array) #2 /Applications/MAMP/htdocs/cover3/modules/panels/src/Plugin/DisplayVariant/PanelsDisplayVariant.php(329): Drupal\panels\Plugin\DisplayBuilder\StandardDisplayBuilder->build(Object(Drupal\panels\Plugin\DisplayVariant\PanelsDisplayVariant)) #3 /Applications/MAMP/htdocs/cover3/modules/page_manager/src/Entity/PageVariantViewBuilder.php(34): Drupal\panels\Plugin\DisplayVariant\PanelsDisplayVariant->build() #4 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/Entity/Controller/EntityViewController.php(96): Drupal\page_manager\Entity\PageVariantViewBuilder->view(Object(Drupal\page_manager\Entity\PageVariant), 'full') #5 [internal function]: Drupal\Core\Entity\Controller\EntityViewController->view(Object(Drupal\page_manager\Entity\PageVariant), 'full') #6 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(123): call_user_func_array(Array, Array) #7 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/Render/Renderer.php(574): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #8 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(124): Drupal\Core\Render\Renderer->executeInRenderContext(Object(Drupal\Core\Render\RenderContext), Object(Closure)) #9 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php(97): Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext(Array, Array) #10 [internal function]: Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() #11 /Applications/MAMP/htdocs/cover3/vendor/symfony/http-kernel/HttpKernel.php(144): call_user_func_array(Object(Closure), Array) #12 /Applications/MAMP/htdocs/cover3/vendor/symfony/http-kernel/HttpKernel.php(64): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #13 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/StackMiddleware/Session.php(57): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #14 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/StackMiddleware/KernelPreHandle.php(47): Drupal\Core\StackMiddleware\Session->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #15 /Applications/MAMP/htdocs/cover3/core/modules/page_cache/src/StackMiddleware/PageCache.php(99): Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #16 /Applications/MAMP/htdocs/cover3/core/modules/page_cache/src/StackMiddleware/PageCache.php(78): Drupal\page_cache\StackMiddleware\PageCache->pass(Object(Symfony\Component\HttpFoundation\Request), 1, true) #17 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/StackMiddleware/ReverseProxyMiddleware.php(47): Drupal\page_cache\StackMiddleware\PageCache->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #18 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php(50): Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #19 /Applications/MAMP/htdocs/cover3/vendor/stack/builder/src/Stack/StackedHttpKernel.php(23): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #20 /Applications/MAMP/htdocs/cover3/core/lib/Drupal/Core/DrupalKernel.php(656): Stack\StackedHttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #21 /Applications/MAMP/htdocs/cover3/index.php(19): Drupal\Core\DrupalKernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #22 {main}.

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shasha_s created an issue. See original summary.

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