Various site requests (HTTP and HTTPS) going through the cloud service are redirected to notify.bluecoat.com.  This ordinarily occurs when Web Security Service (WSS) has Captive Portal enabled for a specific location (Service > Network > Locations) and the Auth Connector has not been installed or is disconnected.
 

Web Security Service

The url notify.bluecoat.com is associated with Captive Portal, which depends upon the Auth Connector to fully operate. When the Auth Connector is not installed or connected, users are redirected to notify.bluecoat.com for various sites.

Verify Auth Connector shows as connected (Service > Authentication > Status) and with a green indicator.  If you are not seeing Auth Connector connected, this may require restarting the BCCA service or reinstalling Auth Connector to achieve a (green) connection.  For each listed location (Service > Network > Locations), verify that Captive Portal is disabled. This stops the error from occurring if you cannot immediately get the AC to connect successfully.