I have seen the Invalid Session Message after I login. It stays on the page for a few seconds then redirects me back to the login page.
I'm not sure why it does this, but I'm pretty sure rebooting the PC and RTU fixes the problem for me. Neerup Kodali Do you know why that happens?
It might be something with the time source not updating correctly. Could you send the configuration for this device to firstname.lastname@example.org
Any other symptoms? Also could you send the SOE log, and System log (hit the download button on the display pages) too.