When I moved the mouse over a link in the infobox at
https://pt.wikipedia.org/w/index.php?diff=48940425
I got the following error:
{ "errorMessage": "TypeError: e.getPageSummary(...).then(...).catch is not a function", "url": "https://pt.wikipedia.org/w/load.php?debug=false&lang=pt&modules=ext.RevisionSlider.Settings%2ClazyJs%7Cext.centralNotice.choiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2CkvStore%2CkvStoreMaintenance%2ClegacySupport%2CstartUp%7Cext.centralauth.ForeignApi%7Cext.centralauth.centralautologin.clearcookie%7Cext.cx.campaigns.contributionsmenu%7Cext.cx.eventlogging%2Cinterlanguagelink%2Cmodel%2Csitemapper%2Cutil%7Cext.cx.widgets.callout%7Cext.echo.api%2Cinit%7Cext.eventLogging%2CnavigationTiming%2Cpopups%2Cthanks%2CwikimediaEvents%7Cext.eventLogging.subscriber%7Cext.popups.images%7Cext.thanks.revthank%7Cext.uls.common%2Ccompactlinks%2Ceventlogger%2Cinit%2Cinterface%2Cpreferences%2Cwebfonts%7Cext.visualEditor.desktopArticleTarget.init%7Cext.visualEditor.supportCheck%2CtargetLoader%2Ctrack%2Cve%7Cext.wikimediaEvents.loggedin%7Cjquery.accessKeyLabel%2CbyteLength%2CcheckboxShiftClick%2Cclient%2Cconfirmable%2Ccookie%2CgetAttrs%2Chidpi%2ChighlightText%2Cmw-jump%2Csuggestions%2CtabIndex%2CtextSelection%2Cthrottle-debounce%7Cjquery.uls.data%7Cmediawiki.ForeignApi%2CRegExp%2CTitle%2CUri%2Capi%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Cnotification%2Cnotify%2CsearchSuggest%2Cstorage%2Ctemplate%2Cuser%2Cutil%7Cmediawiki.ForeignApi.core%7Cmediawiki.action.view.postEdit%7Cmediawiki.api.options%2Cuser%2Cwatch%7Cmediawiki.language.data%2Cinit%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%2Cstartup%7Cmediawiki.page.watch.ajax%7Cmediawiki.template.mustache%2Cregexp%7Cmediawiki.ui.button%2Cicon%7Cmmv.bootstrap%2Chead%7Cmmv.bootstrap.autostart%7Coojs%2Coojs-ui-core%2Coojs-ui-windows%2Csite%7Coojs-ui.styles.icons-movement%7Cschema.UniversalLanguageSelector%7Cskins.vector.js%7Cuser.defaults&skin=vector&version=1djrf9g", "lineNumber": 91, "columnNumber": 8995, "errorObject": {} }