In certain cases, when you navigate from the Administration screen to the Editor screen and the session times out, you might not be able to log into the Control Center.
Workaround: Close the browser, open another browser, and log in again.
If you are in the Administration screen and the session times out, when you log in again, the window might display incorrectly. If this happens, close the browser and log in again.
To vary the session time-out, modify the time-out setting in the /opt/terraspring/gw/war/WEB-INF/web.xml file. Look for the session-timeout tag. The value is specified in minutes.