Update Vat.php

Declare module namespace before template path

Author: mageprince

app/code/Magento/Customer/Block/Adminhtml/Sales/Order/Address/Form/Renderer/Vat.php

@@ -24,7 +24,7 @@ class Vat extends \Magento\Backend\Block\Widget\Form\Renderer\Fieldset\Element
     /**
      * @var string
      */
-    protected $_template = 'sales/order/create/address/form/renderer/vat.phtml';
+    protected $_template = 'Magento_Customer::sales/order/create/address/form/renderer/vat.phtml';
 
     /**
      * @var \Magento\Framework\Json\EncoderInterface