“You do not have sufficient permissions to access this page”

None of the admin pages under tablepress are accessible. I get the dreaded “You do not have sufficient permissions to access this page” message. I have tried to manually delete the tablepress folder and re-install the plugin, but get the same message. I am the super admin of a standard multisite installation, and have also tried as “normal” admin for this site without success. It shows the tables correctly on the site, but i cannot get in to the admin part anymore.
Do you have any idea on what to do?

The page I need help with: [log in to see the link]