Problem with LDAP login

Hi all,

I have installed GVM 21.4 from source.
However I have problem with LDAP integration.
And I have installed gitlab, Jenkins, Sonarqube with same setting and same server for LDAP successfully.

I am using ldap not ldaps
Here are some log may help

==> /opt/gvm/var/log/gvm/gvmd.log <==
lib ldap:WARNING:2021-07-11 20h36.22 utc:171316: StartTLS failed, trying to establish ldaps connection.
lib ldap:WARNING:2021-07-11 20h36.22 utc:171316: LDAP anonymous authentication failure: Can’t contact LDAP server
md gmp:WARNING:2021-07-11 20h36.22 utc:171316: Authentication failure for ‘ldapuser’ from unix_socket
==> /opt/gvm/var/log/gvm/gsad.log <==
gsad gmp:WARNING:2021-07-11 20h36.22 UTC:1043: Authentication failure for ‘ldapuser’ from Status was 2.

GVM versions

Greenbone Security Assistant 21.04.0~git-2cffc292b-HEAD
Greenbone Vulnerability Manager 21.4.0~git-d8d82b405-HEAD
OpenVAS 21.4.0~git-4f11a5e3-HEAD
GIT revision ~git-4f11a5e3-HEAD
gvm-libs 21.4.0~git-4174a549-HEAD


**Operating system: Ubuntu 20.04.2 LTS
**Kernel: 5.4.0-77-generic
**Installation method / source: source

Thanks a lot