| Drupal\Core\Config\Schema\SchemaIncompleteException: Schema errors for dummyimage.settings with the following errors: dummyimage.settings:langcode missing schema in Drupal\Core\Config\Testing\ConfigSchemaChecker->onConfigSave() (line 98 of /var/lib/drupaltestbot/sites/default/files/checkout/core/lib/Drupal/Core/Config/Testing/ConfigSchemaChecker.php). Drupal\Core\Config\Testing\ConfigSchemaChecker->onConfigSave(Object, 'config.save', Object)
Drupal\Component\EventDispatcher\ContainerAwareEventDispatcher->dispatch('config.save', Object)
Drupal\Core\Config\Config->save(1)
Drupal\Core\Config\ConfigInstaller->createConfiguration('', Array)
Drupal\Core\Config\ConfigInstaller->installDefaultConfig('module', 'dummyimage')
Drupal\Core\ProxyClass\Config\ConfigInstaller->installDefaultConfig('module', 'dummyimage')
Drupal\Core\Extension\ModuleInstaller->install(Array, 1)
Drupal\Core\ProxyClass\Extension\ModuleInstaller->install(Array, 1)
Drupal\simpletest\WebTestBase->installModulesFromClassProperty(Object)
Drupal\simpletest\WebTestBase->setUp()
Drupal\simpletest\TestBase->run(Array)
simpletest_script_run_one_test('1', 'Drupal\dummyimage\Tests\DummyImageTest')
| Uncaught exception | ConfigSchemaChecker.php | 98 | Drupal\Core\Config\Testing\ConfigSchemaChecker->onConfigSave() |  |