In KE14 as well as in Winterfell, if I go to Settings and (without changing anything) I submit a form with any resource object type, e.g. Car the object type definition is modified in a way that the resource name input is disabled. Because of this you can change name of an existing resource nor add a new one.
Related, but maybe not the cause if the issue is non-sense definition of cn field in auto_form_fields:
"auto_form_fields" => Array( "cn" => Array( "data" => Array( "cn", ), ),
Note that before form submit as well as after, the cn field is marked as read-only in the form.