Login as system administrator
Go to http://rsv.londynek.net/rserver/www/admin/account-settings-user-interface.php
Tick
Force SSL Access on User Interface
Click save.
You need the same FQDN for all instances in the loadbalancer pool. data-revive-id is a hash of the hostname tags are served from, if it doesn't match, no data gets served.
Too be honest, I can't recall, Revive 3.2 might still work, but you'd have to test that. I would recommend to run Revive Adserver on a (different) server with a newer PHP version.