I have been using NodeRED on the RPi for a couple of days, but then it started saying I had "credential errors" to IBM BlueMix (which works fine), and now NodeRED won't startup on the RPi at all. Network connections are up, everything else seems fine, but attempting to start NodeRED results in a loop of startup messages, followed by "session opened for root user (uid=0)" and then immediately "session closed for root user". Any attempt to reload the web page to localhost:1880 show either just a word or two of "NodeRED", or nothing at all / "Unable to connect".
I've tried rebooting, shutting down and letting the RPi cool off for 30 minutes, etc. No luck. Thoughts, anyone?