Overrides Drupal\Core\Entity\EntityFormController::validate().
Overrides EntityFormController::validate
public function validate(array $form, array &$form_state) {
$wizard_type = $form_state['values']['show']['wizard_key'];
$wizard_instance = drupal_container()
->get('plugin.manager.views.wizard')
->createInstance($wizard_type);
$form_state['wizard'] = $wizard_instance
->getDefinition();
$form_state['wizard_instance'] = $wizard_instance;
$errors = $form_state['wizard_instance']
->validateView($form, $form_state);
foreach ($errors as $name => $message) {
form_set_error($name, $message);
}
}