And kaboom! What should have been super smooth and easy blew up. So the router became adopted according to itself. When accessed via IP address it would say its managed by the controller with only...

Aha, that did the trick, Java needed to be manually unblocked in the firewall. Thanks!

Deployed a ER7206 as standalone to get client up and running asap. Latest firmware installed without issues. Need to setup OpenVPN. Installed the latest v5 software controller on their server....