Setup:

  • IIS 8
  • MS SQL Server 2012
  • Drupal 8.3.6
  • PHP 7.1.7

Repro steps:

  1. Manually install module.
  2. Go to the /admin/config/development/backup_migrate

The website encountered an unexpected error. Please try again later.
TypeError: Argument 2 passed to BackupMigrate\Core\Plugin\PluginManager::add() must implement interface BackupMigrate\Core\Plugin\PluginInterface, null given, called in \modules\contrib\backup_migrate\src\EntityPlugins\SourcePluginBase.php on line 23 in BackupMigrate\Core\Plugin\PluginManager->add() (line 74 of modules\contrib\backup_migrate\vendor\backupmigrate\core\src\Plugin\PluginManager.php).

BackupMigrate\Core\Plugin\PluginManager->add('entire_site', NULL) (Line: 23)
BackupMigrate\Drupal\EntityPlugins\SourcePluginBase->alterBackupMigrate(Object, 'entire_site', Array) (Line: 153)
backup_migrate_backup_migrate_service_object_alter(Object, Array, NULL) (Line: 501)
Drupal\Core\Extension\ModuleHandler->alter('backup_migrate_service_object', Object, Array) (Line: 77)
backup_migrate_get_service_object() (Line: 38)
Drupal\backup_migrate\Form\BackupMigrateQuickBackupForm->buildForm(Array, Object)
call_user_func_array(Array, Array) (Line: 514)
Drupal\Core\Form\FormBuilder->retrieveForm('backup_migrate_ui_manual_backup_quick', Object) (Line: 271)
Drupal\Core\Form\FormBuilder->buildForm('backup_migrate_ui_manual_backup_quick', Object) (Line: 74)
Drupal\Core\Controller\FormController->getContentResult(Object, Object)
call_user_func_array(Array, Array) (Line: 123)
Drupal\Core\EventSubscriber\EarlyRenderingControllerWrapperSubscriber->Drupal\Core\EventSubscriber\{closure}() (Line: 574)
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}()
call_user_func_array(Object, Array) (Line: 144)
Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object, 1) (Line: 64)
Symfony\Component\HttpKernel\HttpKernel->handle(Object, 1, 1) (Line: 57)
Drupal\Core\StackMiddleware\Session->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\KernelPreHandle->handle(Object, 1, 1) (Line: 99)
Drupal\page_cache\StackMiddleware\PageCache->pass(Object, 1, 1) (Line: 78)
Drupal\page_cache\StackMiddleware\PageCache->handle(Object, 1, 1) (Line: 47)
Drupal\Core\StackMiddleware\ReverseProxyMiddleware->handle(Object, 1, 1) (Line: 50)
Drupal\Core\StackMiddleware\NegotiationMiddleware->handle(Object, 1, 1) (Line: 23)
Stack\StackedHttpKernel->handle(Object, 1, 1) (Line: 656)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)

Comments

codehitman created an issue. See original summary.

codehitman’s picture

codehitman commented
Issue summary: View changes
yukare’s picture

yukare commented

I have seen an error like this because webprofiler. If you have webprofiler, disable the webprofiler and see if you still have the error. If the error is gone, try to use the dev version of webprofiler which contains a fix for this type of error.

codehitman’s picture

codehitman commented
Status: Active » Closed (cannot reproduce)

Thanks for the response! Due to the urgency of what I was doing, I attempted another way to migrate the site; I succeeded. Hence, I cannot reproduce this error anymore- closing.

I don't recall having webprofiler on though; it was on a client computer and have no way of checking.