It appears the backups are still running as the replication of a server to another core is still occurring. I've tried logging into the core remotely, and on the core machine itself with IE and Firefox (ESR52) and at most I get the login popup, but no further to speak of. I may get an error about certificates and if I add the exception, I get the following under IE:
Not Found
HTTP Error 404. The requested resource is not found.
Under Firefox I get:
Secure Connection Failed.
I've checked the services on the bad core with a good working core, and they're all running. I've even done a repair of the core via Control Panel/Programs. Rebooted etc. No recent patches were installed just prior to the core not responding.
Running RR 6.0.2.144 on Windows 10 (it's a small core)