Proxy session has expired.
- Session has expired due to "Ttl" or "DateExpiry" has been reached.
- If Session has DateExpiry property set, it overrides the Ttl value and session will expire as soon as DateExpiry is reached.
- If Both the properties are not set, default Ttl is set to 90 days and session expires when Ttl is reached.
Create a new session or re-open a closed session within the service. Refer: docs