Security Tokens are saved in Cache. Are you getting this error when you spend a lot of TIME on a page without reloading it or other activity? This is (more than likely) a Joomla issue not a Seblod issue.
The ONLY time I've seen this is when my page has expired. Then I have to close my browser completely and reload the page and everything should work fine.
I'm surprised (not really) no one has answered this for you. Such a great product, so few helpers.
Security tokens are how the "Session" is tracked. It's used as, well, a security measure. When you log in to your back or front, it puts a Security Token (cookie) in your cache, as time ticks by it checks to make sure that you're still active and the time has not expired. If it expires you need to, close your browser page and open a clean one and log back in.
If you're timing out too soon, you can change the amount of time this takes to happen.
Try this and see if it fixes the problem:
- In Joomla Backend - Go to GLOBAL CONFIGURATION
- Tab to SYSTEM
- Under the CACHE section of that tab, change CACHE TIME to no more than 30. (unless you're working localhost or the site is not open to public use)
- SAVE
That SHOULD do it. Now you can take your time to work on your forms and lists and you will have 30 minutes before the cache needs to be reloaded.
I HOPE this helps. It should but not 100% positive. Like I said, that's the ONLY time I've EVER seen your particular error.
-Dave