that means that cgminer did not start yet or bailed out with errors and the web interface cannot connect to the cgminer api.
Wait for it to come online if you see it running in the connect page.
Check your configuration if it will not keep running.
Good luck.
Hi! Guys. Please need your help. Today i have start A4 block (138M) and after connect and config it. (software 1.0.3) i recieve message "Error getting version for 127.0.0.1:4028 ERR: socket connect(127.0.0.1:4028) failed!" What that mean?