Implementation specific error (80) seems to have many possible causes as permissions, ownership and the certificate files accordingly generated. But when I was giving up the order of added attributes really made my day.
The one which finally worked for me:
root@ldap:~# cat add7.ldif
Are you experiencing any particular error when you run the getent passwd command or try to login with an ldap user login? At this point with all of the edits that you have made to your configurarion, if you have followed each of those tutorials, you might be better off starting over again with setting up the client-side configuration fresh. I did notice that ...
sudo apt install aptitude
sudo aptitude install ldap-utils
Keep the following packages at their current version:
1) ldap-utils [Not Installed]
Accept this solution? [Y/n/q/?] **n**
The following actions will resolve these dependencies:
Downgrade the following packages: