Gitlab LDAP Authentication - Issue - Could not authenticate you from Ldapmain because “Invalid credentials for user.name”

ldap configuration
Configured /etc/ldap/ldap.conf :
BASE dc=serverX,dc=lan
URI     ldap://serverX.lan
TLS_CACERT /etc/ssl/certs/ca-certificates.crt
Configured /etc/gitlab/gitlab.rb :
gitlab_rails['ldap_enabled'] = true
gitlab_rails['ldap_servers'] = YAML.load <<-eos 389="" active_directory:="" allow_username_or_email_login:="" attributes:="" base:="" bind_dn:="" block_auto_created_users:="" cn="" code="" email:="" email="" encryption:="" false="" first_name:="" givenname="" host:="" itlab="" label:="" last_name:="" ldap="" mail="" method:="" name:="" or="" ou="users,dc=serverX,dc=lan" password:="" plain="" port:="" samaccountname="" sn="" ssl="" tls="" true="" uid:="" uid="" user_filter:="" userid="" username:="" userprincipalname="" xxxx="">
Output of gitlab-rake gitlab:ldap:check is OK :
# gitlab-rake gitlab:ldap:check
Checking LDAP ...

LDAP: ... Server: ldapmain
LDAP authentication... Success
LDAP users with access to your GitLab server (only showing the first 100 results)

Checking LDAP ... Finished
Check your /etc/gitlab/gitlab.rb
gitlab_rails['ldap_servers'] = YAML.load <<-eos 389="" active_directory:="" allow_username_or_email_login:="" base:="" bind_dn:="" block_auto_created_users:="" cn="admin,ou=users,dc=serverX,dc=lan" code="" encryption:="" false="" host:="" itlab="" label:="" ldap="" ou="users,dc=serverX,dc=lan" password:="" plain="" port:="" uid:="" uid="" xxxx="">