You've been signed out of skype.
I get this message a couple of times a day on average. Then skype logs me back in automatically. I don't know why, it is not inactivity. Sometimes I get thrown out of skype when I am in the middle of a call. That is the inconvenient bit.
This is the web based version of skype that runs in chromium. I am really pleased that I can run skype under Freebsd. Not that I particularly like it or care about microsoft, it enables me to keep in touch with other inflexible dinosaurs.
Oops, thrown out again.
Anyone else get this?