Stack trace:
at OO.ui.MenuTagMultiselectWidget.prototype.removeItems/< URL1:522:32 at OO.ui.MenuTagMultiselectWidget.prototype.removeItems URL1:521:989 at OO.ui.TagMultiselectWidget.prototype.removeTagByData URL1:513:784 at OO.ui.MenuTagMultiselectWidget.prototype.onMenuChoose URL1:521:85 at OO.EventEmitter.prototype.emit URL1:242:483 at OO.ui.SelectWidget.prototype.chooseItem URL1:345:541 at OO.ui.MenuSelectWidget.prototype.chooseItem URL1:353:477 at OO.ui.SelectWidget.prototype.onDocumentMouseUp URL1:337:140 URL1: https://www.mediawiki.org/w/load.php?lang=en&modules=ext.centralNotice.geoIP%7Cext.centralauth.centralautologin%7Cext.eventLogging%2CnavigationTiming%2CwikimediaEvents%7Cext.uls.common%2Ccompactlinks%2Cinit%2Cinterface%2Cpreferences%2Cwebfonts%7Cjquery%2Coojs%2Coojs-ui%2Coojs-ui-core%2Coojs-ui-toolbars%2Coojs-ui-widgets%2Coojs-ui-windows%2Csite%7Cjquery.client%2Ccookie%2CmakeCollapsible%2CtextSelection%7Cjquery.makeCollapsible.styles%7Cjquery.uls.data%7Cmediawiki.String%2CTitle%2CUri%2Capi%2Capipretty%2Cbase%2Ccldr%2Ccookie%2Cexperiments%2CjqueryMsg%2Clanguage%2Cstorage%2Cuser%2Cutil%2Cwidgets%7Cmediawiki.editfont.styles%7Cmediawiki.libs.pluralruleparser%7Cmediawiki.page.ready%7Cmediawiki.special.apisandbox%7Cmediawiki.ui.button%7Cmediawiki.widgets.datetime%2Cstyles%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-toolbars.icons%7Coojs-ui-widgets.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.icons-content%2Cicons-editing-advanced%2Cicons-interactions%2Cicons-moderation%2Cicons-movement%2Cindicators%7Cskins.vector.legacy.js%7Cuser.defaults&skin=vector&version=lsyac