fixup! Use PAS API.

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/Base_getOwnerTitle.py

 """Returns the name of the owner of current document
 """
-owner_id_list = [i[0] for i in context.get_local_roles() if 'Owner' in i[1]]
-if owner_id_list:
-  found_user_path_set = {x['path'] for x in context.acl_users.searchUsers(id=tuple(owner_id_list), exact_match=True) if 'path' in x}
-  if found_user_path_set:
-    found_user_path, = found_user_path_set
-    return context.getPortalObject().restrictedTraverse(found_user_path).getTitle()
-  return owner_id_list[0]
+from zExceptions import Unauthorized
+# A single value is generally expecteted, do not bother optimising for other cases unless necessary.
+owner_id = None
+for user_id, role_set in context.get_local_roles():
+  if 'Owner' in role_set:
+    owner_id = user_id
+    try:
+      user = context.Base_getUserValueByUserId(user_id)
+      if user is not None:
+        return user.getTitle()
+    except Unauthorized:
+      pass
+return owner_id