I have configure Ldap server with samba to authenticate clients
but I am getting this error

Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
Failed to issue the StartTLS instruction: Protocol error
Connection to LDAP server failed for the 1 try!
add_new_domain_info: failed to add domain dn= sambaDomainName=LDAPSERVER,dc=ldapserver with: Invalid DN syntax
invalid DN
smbldap_search_domain_info: Adding domain info for LDAPSERVER failed with NT_STATUS_UNSUCCESSFUL