No the box isn’t checked. But I think the problem is solved..
I previously linked the plugin to an already exisiting app on facebook, what I now did is create a new facebook app and link the plugin to the new app. Since then no problems.
BTW how often should one login to renew the token at least?(once a week, once a month?)
Thanks for your help
This is the exact message (after 2 hours):
Fatal error: Uncaught OAuthException: Error validating access token: Session has expired at unix time 1361556000. The current unix time is 1361557423. thrown in /home/wens/domains/wens.nu/public_html/wp-content/plugins/recent-facebook-posts/classes/facebook-php-sdk/base_facebook.php on line 1238
Renewing access token in admin panel solves it, but of course not what one wants every 2 hours.