I've just started getting a similar error, but mine is occurring when even trying to locate my Tablo - which I have checked - it's online and all's good there. I did do a reset on it for safe measure. I've uninstalled TR, restarted computer, re-installed. No luck. Everytime I try to access the Log File it stops responding, HELP!!! Thank you!!! I have a screenshot saved, but I'm new to the community, so I don't think it'll let me share. BUT, exact same 503: server unavailable error.