I encountered an error when installing on Drupal CMS

Created on 19 June 2025, 4 days ago

Hello, first time attempting to install Experience Builder on a fresh copy of Drupal CMS. Module was downloaded via composer require 'drupal/experience_builder:^0.4@alpha' Then enabled through the UI. When attempting to expose to my theme (../admin/appearance/settings/drupal_cms_olivero), site returns:

The website encountered an unexpected error. Try again later.

AssertionError: assert([] === iterator_to_array($page_region->getTypedData()->validate())) in assert() (line 283 of modules/contrib/experience_builder/src/Entity/PageRegion.php).

Drupal\experience_builder\Entity\PageRegion::createFromBlockLayout() (Line: 74)
Drupal\experience_builder\Hook\PageRegionHooks::formSystemThemeSettingsSubmit()
call_user_func_array() (Line: 105)
Drupal\Core\Form\FormSubmitter->executeSubmitHandlers() (Line: 43)
Drupal\Core\Form\FormSubmitter->doSubmitForm() (Line: 589)
Drupal\Core\Form\FormBuilder->processForm() (Line: 144)
Drupal\autosave_form\Form\AutosaveFormBuilder->processForm() (Line: 321)
Drupal\Core\Form\FormBuilder->buildForm() (Line: 97)
Drupal\autosave_form\Form\AutosaveFormBuilder->buildForm() (Line: 73)
Drupal\Core\Controller\FormController->getContentResult()
call_user_func_array() (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 622)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 121)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->wrapControllerExecutionInRenderContext() (Line: 97)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 183)
Symfony\Component\HttpKernel\HttpKernel->handleRaw() (Line: 76)
Symfony\Component\HttpKernel\HttpKernel->handle() (Line: 53)
Drupal\Core\StackMiddleware\Session->handle() (Line: 48)
Drupal\Core\StackMiddleware\KernelPreHandle->handle() (Line: 28)
Drupal\Core\StackMiddleware\ContentLength->handle() (Line: 32)
Drupal\big_pipe\StackMiddleware\ContentLength->handle() (Line: 116)
Drupal\page_cache\StackMiddleware\PageCache->pass() (Line: 90)
Drupal\page_cache\StackMiddleware\PageCache->handle() (Line: 48)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle() (Line: 51)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle() (Line: 53)
Drupal\Core\StackMiddleware\AjaxPageState->handle() (Line: 51)
Drupal\Core\StackMiddleware\StackedHttpKernel->handle() (Line: 715)
Drupal\Core\DrupalKernel->handle() (Line: 19)

Thank you.

πŸ’¬ Support request
Status

Active

Version

0.0

Component

Theme builder

Created by

πŸ‡ΊπŸ‡ΈUnited States NonProfit

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