A significant amount of errors mostly on mobile Chrome on Commons and French Wikipedia
https://logstash.wikimedia.org/app/kibana#/doc/logstash-*/logstash-2020.09.16/clienterror/?id=AXSYFS45LNRtRo5XRCmn
```
at URL1:65:990
at emitLayoutShift URL1:65:718
at PerformanceObserver.<anonymous> URL1:66:487
URL1: https://ca.m.wikipedia.org/w/load.php?lang=ca&modules=ext.centralNotice.bannerHistoryLogger%2CchoiceData%2Cdisplay%2CgeoIP%2CimpressionDiet%2ClargeBannerLimit%7Cext.eventLogging%2CnavigationTiming%2CwikimediaEvents%7Cjquery%2Coojs-ui-core%2Coojs-ui-widgets%2Coojs-ui-windows%7Cjquery.client%7Cmediawiki.Title%2Capi%2Cbase%7Cmediawiki.page.ready%7Cmediawiki.page.watch.ajax%7Cmobile.init%2Cstartup%7Cmobile.ooui.icons%7Cmobile.placeholder.images%7Cmobile.startup.images%7Coojs-ui-core.icons%2Cstyles%7Coojs-ui-widgets.icons%7Coojs-ui-windows.icons%7Coojs-ui.styles.indicators%7Cskins.minerva.icons.images.scripts.misc%7Cskins.minerva.icons.page.issues.default.color%7Cskins.minerva.icons.page.issues.medium.color%7Cskins.minerva.icons.page.issues.uncolored%7Cskins.minerva.scripts%7Cuser.defaults%7Cwikibase.client.data-bridge.init&skin=minerva&version=16t48
```