I have configured the openldap multimaster based on this guide: https://kifarunix.com/setup-openldap-master-master-replication-on-centos-8/ but the replication between two servers doesn't work. and I get these errors:

on server1: slap_client_connect: URI=ldaps://ldapmaster02.kifarunix-demo.com DN="cn=admin,dc=ldapmaster,dc=kifarunix-demo,dc=com" ldap_sasl_bind_s failed (-1)

on server 2:slap_client_connect: URI=ldaps://ldapmaster01.kifarunix-demo.com DN="cn=admin,dc=ldapmaster,dc=kifarunix-demo,dc=com" ldap_sasl_bind_s failed (-1).

I didn't receive any reply from the article writer.

what is wrong in the guide? Regards