I have set up Workbench Access and Workbench Moderation and it is working in creating revisions for the Main Page Content section but when I go to add additional fields using the Workbench Access control field checkbox, I cannot enable the field and a message displays
This field cannot be used for access control
How is it possible to allow a custom field to be added to access control? I’ve enabled the correct content type, set up vocabularies and set the Access control fields with the node reference field from the content type.