Thread:Project:Support desk/ Namespace prefix o on p is not defined

A few pages on our media wiki have started providing the below error message, but we are not certain why or what is causing it, looks like a database error to me.

 This page contains the following errors:[edit] error on line 1 at column 35: attributes construct error Below is a rendering of the page up to the first error.[edit]

It only appears on a few pages, and similar pages still works.