Error 500 on publish company without address.

Prereq.: Customer group exists.

Steps:

1. Log in to backoffice as admin
2. Go to Customers / Companies.
3. Click Create.
4. Set "Is active" to On.
5. Choose Sale rep.
6. Enter mandatory fields - Name, Tax ID, Website.
7. Publish.

Actual result: Error 500 occurs

Ibexa\Core\Base\Exceptions\ContentFieldValidationException: Content Fields did not validate

Expected result: Validation for Billing address. Indication field is mandatory.