Undefined index: #parents FormState.php

Notices appear when trying to save contend with missing required entity reference to media field.

Notice: Undefined index: #parents 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).