There was a very small mistake. I have listed a few possibilities from which yours could be either one or more.
Check your FQDN/IP address. You need to put either one of them and not both.
If you are following the docs, it’s not necessary you need to put the same IP (192.168.27.10). Your IP could be different.
Check the Username carefully. Mine was supposed to be " cn=admin,dc=renayy,dc=local "
Check the Basedn. In my case, it should have been " dc=renayy,dc=local "
Check whether you have enabled protected authorization while integrating LDAP, i.e. add username and password when adding server details. Here’s a screenshot for reference.
After making changes, this is the whole configuration while adding a new LDAP server to SafeSquid.