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Drupal\search_api\SearchApiException: The backend with ID 'search_api_db' could not be retrieved for server 'Paragraphs demo server'. in Drupal\search_api\Entity\Server->getBackend() (line 225 of modules/contrib/search_api/src/Entity/Server.php).
Drupal\search_api\Entity\Server->getBackend() (Line: 80)
Drupal\search_api_solr\Plugin\DataType\Deriver\SolrDocumentDeriver->getDerivativeDefinitions() (Line: 101)
Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator->getDerivatives() (Line: 87)
Drupal\Component\Plugin\Discovery\DerivativeDiscoveryDecorator->getDefinitions() (Line: 340)
Drupal\Core\Plugin\DefaultPluginManager->findDefinitions() (Line: 216)
Drupal\Core\Plugin\DefaultPluginManager->getDefinitions() (Line: 25)
Drupal\Core\Plugin\DefaultPluginManager->getDefinition() (Line: 195)
Drupal\Core\TypedData\DataDefinition->getClass() (Line: 610)
Drupal\Core\Field\BaseFieldDefinition->getMainPropertyName() (Line: 463)
Drupal\Core\Field\BaseFieldDefinition->setDefaultValue() (Line: 54)
Drupal\Core\Entity\EditorialContentEntityBase::revisionLogBaseFieldDefinitions() (Line: 23)
Drupal\Core\Entity\EditorialContentEntityBase::baseFieldDefinitions() (Line: 308)
Drupal\profile\Entity\Profile::baseFieldDefinitions() (Line: 242)
Drupal\Core\Entity\EntityFieldManager->buildBaseFieldDefinitions() (Line: 204)
Drupal\Core\Entity\EntityFieldManager->getBaseFieldDefinitions() (Line: 471)
Drupal\Core\Entity\EntityFieldManager->getFieldStorageDefinitions() (Line: 507)
Drupal\Core\Entity\EntityFieldManager->getActiveFieldStorageDefinitions() (Line: 187)
Drupal\Core\Entity\Sql\SqlContentEntityStorage->__construct() (Line: 149)
Drupal\Core\Entity\Sql\SqlContentEntityStorage::createInstance() (Line: 280)
Drupal\Core\Entity\EntityTypeManager->createHandlerInstance() (Line: 269)
Drupal\Core\Entity\EntityTypeManager->getHandler() (Line: 192)
Drupal\Core\Entity\EntityTypeManager->getStorage() (Line: 127)
Drupal\utilities\Theme\Spark451Themer->__construct()
ReflectionClass->newInstanceArgs() (Line: 1202)
Symfony\Component\DependencyInjection\ContainerBuilder->createService() (Line: 637)
Symfony\Component\DependencyInjection\ContainerBuilder->doGet() (Line: 1320)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1272)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1799)
Symfony\Component\DependencyInjection\ContainerBuilder->callMethod() (Line: 1228)
Symfony\Component\DependencyInjection\ContainerBuilder->createService() (Line: 637)
Symfony\Component\DependencyInjection\ContainerBuilder->doGet() (Line: 1320)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1272)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1799)
Symfony\Component\DependencyInjection\ContainerBuilder->callMethod() (Line: 1228)
Symfony\Component\DependencyInjection\ContainerBuilder->createService() (Line: 637)
Symfony\Component\DependencyInjection\ContainerBuilder->doGet() (Line: 1320)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1272)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1172)
Symfony\Component\DependencyInjection\ContainerBuilder->createService() (Line: 637)
Symfony\Component\DependencyInjection\ContainerBuilder->doGet() (Line: 1320)
Symfony\Component\DependencyInjection\ContainerBuilder->doResolveServices() (Line: 1265)
Symfony\Component\DependencyInjection\ContainerBuilder->resolveServices() (Line: 1276)
Symfony\Component\DependencyInjection\ContainerBuilder->Symfony\Component\DependencyInjection\{closure}() (Line: 61)
Symfony\Component\DependencyInjection\ServiceLocator->doGet() (Line: 43)
Symfony\Component\DependencyInjection\ServiceLocator->get() (Line: 662)
Drupal\Core\Theme\ThemeManager->getThemeEngine() (Line: 578)
Drupal\Core\Theme\Registry->processExtension() (Line: 481)
Drupal\Core\Theme\Registry->build() (Line: 326)
Drupal\Core\Theme\Registry->get() (Line: 90)
Drupal\Core\Utility\ThemeRegistry->initializeRegistry() (Line: 71)
Drupal\Core\Utility\ThemeRegistry->__construct() (Line: 368)
Drupal\Core\Theme\Registry->getRuntime() (Line: 139)
Drupal\Core\Theme\ThemeManager->render() (Line: 500)
Drupal\Core\Render\Renderer->doRender() (Line: 253)
Drupal\Core\Render\Renderer->doRenderRoot() (Line: 143)
Drupal\Core\Render\Renderer->Drupal\Core\Render\{closure}() (Line: 634)
Drupal\Core\Render\Renderer::Drupal\Core\Render\{closure}()
Fiber->resume() (Line: 649)
Drupal\Core\Render\Renderer->executeInRenderContext() (Line: 142)
Drupal\Core\Render\Renderer->renderInIsolation() (Line: 113)
Drupal\Core\Render\Renderer->renderRoot() (Line: 79)
Drupal\Core\Render\BareHtmlPageRenderer->renderBarePage() (Line: 76)
Drupal\Core\ProxyClass\Render\BareHtmlPageRenderer->renderBarePage() (Line: 1069)
install_display_output() (Line: 161)
install_drupal() (Line: 53)