Internal error

[8fa56829b1af667dbf905944] /WikibaseItem:Q35134 TypeError: Wikibase\Lib\LanguageNameLookup::getName(): Argument #1 ($languageCode) must be of type string, null given, called in /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/SiteLinksView.php on line 296

Backtrace:

from /srv/www/scoutwiki/extensions-1.43/Wikibase/lib/includes/LanguageNameLookup.php(55)
#0 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/SiteLinksView.php(296): Wikibase\Lib\LanguageNameLookup->getName()
#1 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/SiteLinksView.php(263): Wikibase\View\SiteLinksView->getHtmlForSiteLink()
#2 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/SiteLinksView.php(182): Wikibase\View\SiteLinksView->getHtmlForSiteLinks()
#3 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/SiteLinksView.php(120): Wikibase\View\SiteLinksView->getHtmlForSiteLinkGroup()
#4 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/ItemView.php(153): Wikibase\View\SiteLinksView->getHtml()
#5 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/ItemView.php(142): Wikibase\View\ItemView->getHtmlForSiteLinks()
#6 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/EntityView.php(57): Wikibase\View\ItemView->getSideHtml()
#7 /srv/www/scoutwiki/extensions-1.43/Wikibase/view/src/ItemView.php(103): Wikibase\View\EntityView->renderEntityView()
#8 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/ParserOutput/FullEntityParserOutputGenerator.php(147): Wikibase\View\ItemView->getContent()
#9 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/ParserOutput/FullEntityParserOutputGenerator.php(100): Wikibase\Repo\ParserOutput\FullEntityParserOutputGenerator->addHtmlToParserOutput()
#10 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/ParserOutput/StatsdTimeRecordingEntityParserOutputGenerator.php(53): Wikibase\Repo\ParserOutput\FullEntityParserOutputGenerator->getParserOutput()
#11 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/Content/EntityHandler.php(861): Wikibase\Repo\ParserOutput\StatsdTimeRecordingEntityParserOutputGenerator->getParserOutput()
#12 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/Content/ItemHandler.php(302): Wikibase\Repo\Content\EntityHandler->getParserOutputFromEntityView()
#13 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/Content/EntityHandler.php(789): Wikibase\Repo\Content\ItemHandler->getParserOutputFromEntityView()
#14 /srv/www/scoutwiki/htdocs-1.43/includes/content/ContentHandler.php(1691): Wikibase\Repo\Content\EntityHandler->fillParserOutput()
#15 /srv/www/scoutwiki/htdocs-1.43/includes/content/Renderer/ContentRenderer.php(79): MediaWiki\Content\ContentHandler->getParserOutput()
#16 /srv/www/scoutwiki/htdocs-1.43/includes/Revision/RenderedRevision.php(263): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#17 /srv/www/scoutwiki/htdocs-1.43/includes/Revision/RenderedRevision.php(236): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached()
#18 /srv/www/scoutwiki/htdocs-1.43/includes/Revision/RevisionRenderer.php(239): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#19 /srv/www/scoutwiki/htdocs-1.43/includes/Revision/RevisionRenderer.php(172): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#20 [internal function]: MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}()
#21 /srv/www/scoutwiki/htdocs-1.43/includes/Revision/RenderedRevision.php(199): call_user_func()
#22 /srv/www/scoutwiki/htdocs-1.43/includes/poolcounter/PoolWorkArticleView.php(106): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#23 /srv/www/scoutwiki/htdocs-1.43/includes/poolcounter/PoolWorkArticleViewCurrent.php(123): MediaWiki\PoolCounter\PoolWorkArticleView->renderRevision()
#24 /srv/www/scoutwiki/htdocs-1.43/includes/poolcounter/PoolCounterWork.php(171): MediaWiki\PoolCounter\PoolWorkArticleViewCurrent->doWork()
#25 /srv/www/scoutwiki/htdocs-1.43/includes/page/ParserOutputAccess.php(362): MediaWiki\PoolCounter\PoolCounterWork->execute()
#26 /srv/www/scoutwiki/htdocs-1.43/includes/page/Article.php(827): MediaWiki\Page\ParserOutputAccess->getParserOutput()
#27 /srv/www/scoutwiki/htdocs-1.43/includes/page/Article.php(547): Article->generateContentOutput()
#28 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/Actions/ViewEntityAction.php(80): Article->view()
#29 /srv/www/scoutwiki/extensions-1.43/Wikibase/repo/includes/Actions/ViewEntityAction.php(55): Wikibase\Repo\Actions\ViewEntityAction->showEntityPage()
#30 /srv/www/scoutwiki/htdocs-1.43/includes/actions/ActionEntryPoint.php(733): Wikibase\Repo\Actions\ViewEntityAction->show()
#31 /srv/www/scoutwiki/htdocs-1.43/includes/actions/ActionEntryPoint.php(510): MediaWiki\Actions\ActionEntryPoint->performAction()
#32 /srv/www/scoutwiki/htdocs-1.43/includes/actions/ActionEntryPoint.php(146): MediaWiki\Actions\ActionEntryPoint->performRequest()
#33 /srv/www/scoutwiki/htdocs-1.43/includes/MediaWikiEntryPoint.php(200): MediaWiki\Actions\ActionEntryPoint->execute()
#34 /srv/www/scoutwiki/htdocs-1.43/index.php(58): MediaWiki\MediaWikiEntryPoint->run()
#35 {main}