Steps to replicate the issue (include links if applicable):
Visit the following dashboard:
https://logstash.wikimedia.org/app/dashboards#/view/AXDBY8Qhh3Uj6x1zCF56?_g=h@218e8f9&_a=h@e95d8f5
What happens?:
We see a large spike in JS related errors, starting on Friday Nov. 7 2025, starting at around 13:30 UTC.
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Software version (on Special:Version page; skip for WMF-hosted wikis like Wikipedia):
- Only affecting: 1.46.0-wmf.1
- across many wikis, most visible on enwiki
- Primarily on Vector 2022 (desktop)
- Affecting anonymous users
Other information (browser name/version, screenshots, etc.):
The errors don't seem to be related to a single module, but rather to module loading itself.
Gadget related errors of this nature were filtered out in T266720
Error: module already implemented: ext.centralNotice.choiceData Error: module already implemented: ext.visualEditor.core.utils.parsing Error: module already implemented: ext.visualEditor.desktopArticleTarget.init Error: module already implemented: jquery Error: module already implemented: ext.categoryTree Error: module already implemented: ext.scribunto.logs
example stacktrace:
message Error: module already implemented: ext.visualEditor.core.utils.parsing meta.domain fr.wikipedia.org meta.dt 2025-11-07T15:34:39.909Z meta.stream mediawiki.client.error normalized_message Error: module already implemented: ext.visualEditor.core.utils.parsing stack_trace at Object.impl https://fr.wikipedia.org/w/load.php?lang=fr&modules=startup&only=scripts&raw=1&skin=vector-2022:18:537 at https://fr.wikipedia.org/w/load.php?lang=fr&modules=ext.visualEditor.core.utils.parsing%7Cext.visualEditor.desktopArticleTarget.init%7Cext.visualEditor.progressBarWidget%2CsupportCheck%2CtargetLoader%2CtempWikitextEditorWidget%2Ctrack%2Cve&skin=vector-2022&version=1rmn4:1:11 type clienterror url https://fr.wikipedia.org/wiki/Exposition_universelle_de_1900