Hello,

One of the CI Jenkins jobs running for MediaWiki repositories had a faulty npm cache being restored. That caused some dependencies to not be properly installed and lead to a faulty build.

The issue apparently started yesterday Nov 8th around 17:30 UTC and should be now resolved as of 8:30 UTC after I have deleted the faulty cache.

The affected job is quibble-vendor-mysql-php72-selenium-docker which runs the Selenium browser test. If a change made to an extension or skin fails mysteriously, please try rechecking the CI change by commenting `recheck` on the change or using:

recheck due to npm cache corruption - T295341

It has hit us a few times in the recent time: * https://phabricator.wikimedia.org/T294426 * https://phabricator.wikimedia.org/T293937 * https://phabricator.wikimedia.org/T295341

I have filed a generic task to further investigate the issue:

* https://phabricator.wikimedia.org/T295351