MediaWiki:Apierror-revisions-singlepage
titles, pageids or a generator was used to supply multiple pages, but the $1limit, $1startid, $1endid, $1dir=newer, $1user, $1excludeuser, $1start, and $1end parameters may only be used on a single page.
There are 1 incomplete or pending task to finish installation of Semantic MediaWiki. An administrator or user with sufficient rights can complete it. This should be done before adding new data to avoid inconsistencies.
titles, pageids or a generator was used to supply multiple pages, but the $1limit, $1startid, $1endid, $1dir=newer, $1user, $1excludeuser, $1start, and $1end parameters may only be used on a single page.