How works LDAP_Write ? NC18.04 LDAP_Write 1.1.0 OpenLDAP Linux

Nextcloud version 18.4
Operating system and version Ubuntu 18.04
Apache 2.4.29
PHP version 7.2.24

In the Admin User, I see some options in the LDAP parts.

When trying to add a new user, I get this:

An error occured during the request. Unable to proceed.
Bad request

In the Error log:

Error ocs_api Exception: Acting admin is not from LDAP

Next, when logged to a normal user, I can not change the profile picture for example. I do not see this possibility.

Let’s up this topic.
Nobody ?