-- The self signed certificate presented by the embedded HTTPS server is expired.

How to create a new self signed SSL certificate for an embedded https server

Trading Configuration > Manage trading configuration
Click the "Manage all embedded servers" option under the section "Change trading engine server configuration"
System Management > Manage embedded Servers
Click the name of the embedded server in question.
Click the "Change the SSL server certificate" option under the section "Or pick a task"

Proceed with certificate creation as normal.