PluginNotFound exception after update to Drupal 8.3

On a clean install, I get the following error message. DB = PostgreSQL 9.6.0

system module
Update add_region_to_entity_displays

Failed: Drupal\Component\Plugin\Exception\PluginNotFoundException: The "media" entity type does not exist. in Drupal\Core\Entity\EntityTypeManager->getDefinition() (line 133 of /var/www/html/core/lib/Drupal/Core/Entity/EntityTypeManager.php).

The 5 pending updates remain, i.e. Drupal tries to do the db updates but can't, so keeps showing on status report.