Try to add placeholder

src/Bundle/ChillPersonBundle/config/services/form.yaml

@@ -1,15 +1,15 @@
 services:
-
     Chill\PersonBundle\Form\:
         autowire: true
         autoconfigure: true
         resource: '../../Form/'
 
     Chill\PersonBundle\Form\PersonType:
+        autowire: true
+        autoconfigure: true
         arguments:
             $personFieldsConfiguration: '%chill_person.person_fields%'
             $configAltNamesHelper: '@Chill\PersonBundle\Config\ConfigPersonAltNamesHelper'
-            $translatableStringHelper: '@Chill\MainBundle\Templating\TranslatableStringHelper'
         tags:
             - { name: form.type, alias: '@chill.person.form.person_creation' }