I realise its early days yet (4 days since launch), and as you might have expected, it won't work on everybody's site, out of the box... and I am one of them.
I have signed up using my Shareasale account but can't get the "Already Have an Account?" to work (just comes back with empty boxes) so I can't use the "Create New Account".
Although you may be having some difficulties at your end, my system is probably at the root of the problem. Its running on Apache but its behind a Nginx proxy at CloudFlare for security, caching and CDN services.
However I have tested it both in and out of developer mode (direct) and it doesn't seem to make a difference. I can't access Zerys from my website ~ http://www.socialstrategy.co.uk