While looking at logstash today I found this error Stacktrace is
at APIsharedImagePagePreviewHTML https://www.mediawiki.org/w/load.php?lang=fr&modules=ext.gadget.BugStatusUpdate%2CCleanDeleteReasons%2CCodeReview_checkedRevsExport%2CDotsSyntaxHighlighter%2CEdittools%2CEdittop%2CHotCat%2CNavigation_popups%2CNotifCountTitle%2CTabOverride%2Cajaxrecentchanges%2Cautolink%2CcollapsibleTables%2Cexternalsearch-bar%2Cpredefined-summaries%2Cpurgetab%2Crtrc%2Csite%2Ctabbedwindow%2CuserMessages%2Cuserfeedback%2Cvector-headanchor%2Cworkinprogress&skin=vector&version=zaz2n:111:495 at https://commons.wikimedia.org/w/api.php?format=json&formatversion=2&callback=pg.fn.APIsharedImagePagePreviewHTML&requestid=1&action=query&prop=revisions&rvprop=content&rvslots=main&titles=File%3ATranslate-move-page.png:1:11