When editing a zone block, Name is a required field. If content is delete and field left blanks, there is no validation / validation message, instead system throws a fatal error.

Steps:

1. Log in to backoffice as admin.
2. Edit Landing Page.
3. Add e.g. Code block.
4. Open Settings.
5. Leave the Name field empty.
6. Submit.

Actual result: Exception occurs

Expected argument of type "string", "NULL" given [in vendor/symfony/symfony/src/Symfony/Component/PropertyAccess/PropertyAccessor.php:269]

Remarks: Validation for the Content field works correctly.