I started getting this on occasion after updating to 7.3.3 (Linux headless server). This is right after logging in so I know its not expired. As you can see I was on the forum and checking something I read here so I know it did not take long to do that. If I click on the “Return to home page” link, it does and things seem to work fine. Just not sure what may be causing it.
Our Ignition Gateway web page is written in Java Wicket. Every time the session expires you will get that message (especially if you are logged in to the config section).
Travis,
Talked with Kevin McClusky it was a permission issue with the 7.3.3 installer. Got it fixed.
Here is a link to a thread which I think was related. And what was done to fix it here.
http://www.inductiveautomation.com/forum/viewtopic.php?f=72&t=7509