==== Error ====
* service.version: 1.43.0-wmf.6
* trace.id: 83b55934-1877-4041-b09f-ded8931ae30d
* [[ https://logstash.wikimedia.org/app/dashboards#/view/AXFV7JE83bOlOASGccsT?_g=(time:(from:'2024-05-20T15:08:30.724Z',to:'2024-05-21T15:11:01.849Z'))&_a=(query:(query_string:(query:'reqId:%2283b55934-1877-4041-b09f-ded8931ae30d%22'))) | Find trace.id in Logstash ]]
```name=labels.normalized_message,lines=10
[{reqId}] {exception_url} TypeError: Argument 1 passed to MediaWiki\Output\OutputPage::parseInternal() must be of the type string, null given, called in /srv/mediawiki/php-1.43.0-wmf.6/includes/Output/OutputPage.php on line 2446
```
```name=error.stack_trace,lines=10
from /srv/mediawiki/php-1.43.0-wmf.6/includes/Output/OutputPage.php(2511)
#0 /srv/mediawiki/php-1.43.0-wmf.6/includes/Output/OutputPage.php(2446): MediaWiki\Output\OutputPage->parseInternal(NULL, MediaWiki\Title\Title, boolean, boolean)
#1 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtView.php(2426): MediaWiki\Output\OutputPage->parseAsContent(NULL)
#2 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtView.php(1616): LqtView::parseSignature(NULL)
#3 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtView.php(1602): LqtView->threadSignature(Thread)
#4 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtView.php(1858): LqtView->showThreadBody(Thread)
#5 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtView.php(2206): LqtView->showSingleThread(Thread)
#6 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/Pages/ThreadHistoricalRevisionView.php(135): LqtView->showThread(Thread, integer, integer, array)
#7 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtDispatch.php(111): ThreadHistoricalRevisionView->show()
#8 /srv/mediawiki/php-1.43.0-wmf.6/extensions/LiquidThreads/includes/LqtDispatch.php(231): LqtDispatch::threadPermalinkMain(MediaWiki\Output\OutputPage, Article, MediaWiki\Title\Title, MediaWiki\User\User, MediaWiki\Request\WebRequest)
#9 /srv/mediawiki/php-1.43.0-wmf.6/includes/HookContainer/HookContainer.php(159): LqtDispatch::tryPage(MediaWiki\Output\OutputPage, Article, MediaWiki\Title\Title, MediaWiki\User\User, MediaWiki\Request\WebRequest, MediaWiki\Actions\ActionEntryPoint)
#10 /srv/mediawiki/php-1.43.0-wmf.6/includes/HookContainer/HookRunner.php(2530): MediaWiki\HookContainer\HookContainer->run(string, array)
#11 /srv/mediawiki/php-1.43.0-wmf.6/includes/actions/ActionEntryPoint.php(695): MediaWiki\HookContainer\HookRunner->onMediaWikiPerformAction(MediaWiki\Output\OutputPage, Article, MediaWiki\Title\Title, MediaWiki\User\User, MediaWiki\Request\WebRequest, MediaWiki\Actions\ActionEntryPoint)
#12 /srv/mediawiki/php-1.43.0-wmf.6/includes/actions/ActionEntryPoint.php(508): MediaWiki\Actions\ActionEntryPoint->performAction(Article, MediaWiki\Title\Title)
#13 /srv/mediawiki/php-1.43.0-wmf.6/includes/actions/ActionEntryPoint.php(145): MediaWiki\Actions\ActionEntryPoint->performRequest()
#14 /srv/mediawiki/php-1.43.0-wmf.6/includes/MediaWikiEntryPoint.php(200): MediaWiki\Actions\ActionEntryPoint->execute()
#15 /srv/mediawiki/php-1.43.0-wmf.6/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#16 /srv/mediawiki/w/index.php(3): require(string)
#17 {main}
```
==== Impact ====
* See `wmgUseLiquidThreads`-`wmgLiquidThreadsFrozen` in https://noc.wikimedia.org/conf/InitialiseSettings.php.txt for potential impact if proceeding with train.
==== Notes ====
* See very similar T365451 in Translate fixed earlier today