What is the problem?
There are lots of errors on beta cluster like:
2021-11-23 10:54:19 [YZzIVpZBhxOk3U@3gBBwxQAAAAQ] deployment-mediawiki11 commonswiki 1.38.0-alpha exception ERROR: [YZzIVpZBhxOk3U@3gBBwxQAAAAQ] /w/index.php?title=Malaysia_apos;s_Gravity-defying_Lion_Dancers_Brought_Down_To_Earth_By...&action=submit Error: Class 'MediaWiki\Extension\WikiEditor\ConfirmEditHooks' not found {"exception_url":"/w/index.php?title=Malaysia_apos;s_Gravity-defying_Lion_Dancers_Brought_Down_To_Earth_By...&action=submit","reqId":"YZzIVpZBhxOk3U@3gBBwxQAAAAQ","caught_by":"entrypoint"} [Error Error] (/srv/mediawiki/php-master/extensions/WikiEditor/includes/Hooks.php:427) Class 'MediaWiki\Extension\WikiEditor\ConfirmEditHooks' not found #0 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(338): MediaWiki\Extension\WikiEditor\Hooks::editPageAttemptSaveAfter(EditPage, Status, array) #1 /srv/mediawiki/php-master/includes/HookContainer/HookContainer.php(137): MediaWiki\HookContainer\HookContainer->callLegacyHook(string, array, array, array) #2 /srv/mediawiki/php-master/includes/HookContainer/HookRunner.php(1557): MediaWiki\HookContainer\HookContainer->run(string, array) #3 /srv/mediawiki/php-master/includes/EditPage.php(1691): MediaWiki\HookContainer\HookRunner->onEditPage__attemptSave_after(EditPage, Status, array) #4 /srv/mediawiki/php-master/includes/EditPage.php(666): EditPage->attemptSave(array) #5 /srv/mediawiki/php-master/includes/actions/EditAction.php(71): EditPage->edit() #6 /srv/mediawiki/php-master/includes/actions/SubmitAction.php(38): EditAction->show() #7 /srv/mediawiki/php-master/includes/MediaWiki.php(534): SubmitAction->show() #8 /srv/mediawiki/php-master/includes/MediaWiki.php(320): MediaWiki->performAction(Article, Title) #9 /srv/mediawiki/php-master/includes/MediaWiki.php(910): MediaWiki->performRequest() #10 /srv/mediawiki/php-master/includes/MediaWiki.php(554): MediaWiki->main() #11 /srv/mediawiki/php-master/index.php(53): MediaWiki->run() #12 /srv/mediawiki/php-master/index.php(46): wfIndexMain() #13 /srv/mediawiki/w/index.php(3): require(string) #14 {main}
Steps to reproduce problem
Edit an article on beta.