I am using a WPMU installation with the latest Apache server under Ubuntu and use Parallels Plesk Panel to monitor the server, each tool/programm updated to the very last release. I use also WPML and run one of the websites in three languages; this is a site where I use "sticky links" instead of Permalinks.
Super Cache works on a website where WPML is inactive.
On the three languages website I even can not activate Super Cache; when I try to the message displayed reads:
A custom url or permalink structure is required for this plugin to work correctly. Please go to the Permalinks Options Page to configure your permalinks.
What should I do?
Thanks for your help!