[pmwiki-users] Error 406

I updated our website, and now get The requested URL /pmwiki/pmwiki.php/Main/HomePage?action=edit encountered error 406. Please contact the site administrator. It happens when I Save a page, or even when I Cancel a save, but only happens for some pages. Fingers crossed it's easy to fix if I

Re: [pmwiki-users] Error 406

This error code is never issued by the PmWiki core, so I suspect a server (mis-)configuration. This request is blocked, never reaching PmWiki. The first thing I'd check is that the server accepts pathname information, like you use pmwiki.php/Main/HomePage instead of