Cannot connect to listener process, a site adminstrator should be notified

Possible Causes

The Shibboleth daemon (shibd) at the SP is unavailable. This means it is either just not running or it is not listening to the port or socket you assigned it to.

Possible Solutions

start the Shibboleth daemon at the SP. (yes, sometimes it is that trivial if you're lucky)
check whether shibd can connect to the socket that it has been assigned to use, defaults are:
- Windows: local TCP port 1600
- *NIX: /var/run/shib-shar.sock
try forcing the daemon to remove the socket first by running shibd -f