--- a/cubicweb/web/views/uicfg.py	Mon Feb 10 16:56:02 2020 +0100
+++ b/cubicweb/web/views/uicfg.py	Wed Feb 12 16:20:10 2020 +0100
@@ -525,7 +525,7 @@
           afs.set_muledit_editable('CWUser', ('firstname', 'surname', 'in_group'))
         """
         for attr in attrs:
-            self.edit_as_attr(self, etype, attr, formtype='muledit')
+            self.edit_as_attr(etype, attr, formtype='muledit')
 
 
 autoform_section = AutoformSectionRelationTags(__module__=__name__)