Error message

• 1 error has been found:
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• Warning: Invalid argument supplied for foreach() in Drupal\Core\Form\FormState->getError() (line 1112 of core/lib/Drupal/Core/Form/FormState.php).
• Warning: Invalid argument supplied for foreach() in Drupal\Core\Form\FormState->getError() (line 1112 of core/lib/Drupal/Core/Form/FormState.php).