Open Source Document Management System | OpenKM

After migrate openKM from 3.0 to 4.1 the list of users appears correctly in the administration pane, but the list of users appears empty in the following dialogues:

* Security of a document.
* Send link of a document.
* Notifications.

We use a LDAP directory for authentication.

Any idea?

have you ldap well done configured ? , take a look at http://wiki.openkm.com/index.php/Installation_Guide, because could be some changes from OpenKM 3.1 to OpenKM 4.x in OpenKM.cfg file, sure the problem is there.