Update Resources/config/form_types.xml

Resources/config/form_types.xml

@@ -51,7 +51,7 @@
 
         <!-- Form Extension -->
         <service id="sonata.admin.form.extension.field" class="Sonata\AdminBundle\Form\Extension\Field\Type\FormTypeFieldExtension">
-            <tag name="form.type_extension" alias="field" />
+            <tag name="form.type_extension" alias="form" />
             <argument />
         </service>