The Session Refused icons are displayed during a possible security breach because authentication has failed.
Problem: Icon shows the 15D message.
The Sun Ray Client is refusing to connect to a server because it is unable to verify the validity of the Sun Ray server. This error can occur only if an unknown Sun Ray server tries to emulate a valid Sun Ray server. This situation is a session security breach.
Problem: Icon shows the 50D message.
The Sun Ray server is refusing to grant a session to the Sun Ray Client because the client is unable to fulfill the server's security requirements.
Upgrade the Sun Ray Client's firmware version. This error can occur with firmware versions earlier than 2.0 when the server is configured for hard security mode.
As an alternative, determine whether your site requires hard security mode. If not, the session can be enabled with soft security mode.