Connection to Server Failed

Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed. Connection to server failed.
This is the message I've been seeing all day. Every time the server is scheduled to go down for maintenance/upgrades at midnight ( which it is scheduled to do again tonight-7/11) I get: Connection to server failed 24 hours before the shutdown. Can any of the developers explain why this is happening?? This is not the first time either.