[GeoNetwork-users] LDAP: Error when trying to log in

Hello!
I am trying to make geonetwork use an openldap-server. The connection via
ldapsearch is ok, other services use it too.
I have done the config as in documentation, snippets follow at the end.
After restartig tomcat i can login as admin like before, invalid usernae
create a wrong username/password message but when i try to log in as a ldap
user the below error-message appears. How can i trigger a manual
syncronisation with the ldap-server?
I have no clue what has gone wrong or where i can change things, so every
hint is very welcome.

Thank you in advance

Uwe Seher

Errormessage:

The Tomcat-log does not show things, the geonetwork log shows things like
this:

My configuration is the default + the LDAP-entries:

config-security.xml

the part of config-security.properties where i have made changes:

config-secirity-overrides.properties

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