Fix Vizy fields failing to validate Vizy blocks, when only Vizy blocks are present in the field.

Author: engram-design

src/fields/VizyField.php

@@ -428,6 +428,7 @@ public function getElementValidationRules(): array
             [
                 'validateBlocks',
                 'on' => [Element::SCENARIO_ESSENTIALS, Element::SCENARIO_DEFAULT, Element::SCENARIO_LIVE],
+                'skipOnEmpty' => false,
             ],
         ];
     }