MediaWiki internal error.

Original exception: [3a4c427ae5b2103026cad363] /wiki/Paralaje InvalidArgumentException: Provided specification is not an array.
Backtrace:
from /var/www/mediawiki/vendor/wikimedia/object-factory/src/ObjectFactory.php(295)
#0 /var/www/mediawiki/vendor/wikimedia/object-factory/src/ObjectFactory.php(174): Wikimedia\ObjectFactory\ObjectFactory::validateSpec()
#1 /var/www/mediawiki/vendor/wikimedia/object-factory/src/ObjectFactory.php(149): Wikimedia\ObjectFactory\ObjectFactory::getObjectFromSpec()
#2 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(516): Wikimedia\ObjectFactory\ObjectFactory->createObject()
#3 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(154): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->instantiatePHPLibrary()
#4 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaStandalone/LuaStandaloneEngine.php(22): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->load()
#5 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaCommon/LuaEngine.php(227): MediaWiki\Extension\Scribunto\Engines\LuaStandalone\LuaStandaloneEngine->load()
#6 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaCommon/LuaModule.php(46): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaEngine->getInterpreter()
#7 /var/www/mediawiki/extensions/Scribunto/includes/Engines/LuaCommon/LuaModule.php(63): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaModule->getInitChunk()
#8 /var/www/mediawiki/extensions/Scribunto/includes/Hooks.php(175): MediaWiki\Extension\Scribunto\Engines\LuaCommon\LuaModule->invoke()
#9 /var/www/mediawiki/includes/parser/Parser.php(3406): MediaWiki\Extension\Scribunto\Hooks->invokeHook()
#10 /var/www/mediawiki/includes/parser/Parser.php(3061): MediaWiki\Parser\Parser->callParserFunction()
#11 /var/www/mediawiki/includes/parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution()
#12 /var/www/mediawiki/includes/parser/Parser.php(3262): MediaWiki\Parser\PPFrame_Hash->expand()
#13 /var/www/mediawiki/includes/parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution()
#14 /var/www/mediawiki/includes/parser/Parser.php(2884): MediaWiki\Parser\PPFrame_Hash->expand()
#15 /var/www/mediawiki/includes/parser/Parser.php(1519): MediaWiki\Parser\Parser->replaceVariables()
#16 /var/www/mediawiki/includes/parser/Parser.php(777): MediaWiki\Parser\Parser->internalParse()
#17 /var/www/mediawiki/extensions/Cite/src/ReferenceListFormatter.php(40): MediaWiki\Parser\Parser->recursiveTagParse()
#18 /var/www/mediawiki/extensions/Cite/src/Cite.php(315): Cite\ReferenceListFormatter->formatReferences()
#19 /var/www/mediawiki/extensions/Cite/src/Cite.php(229): Cite\Cite->formatReferences()
#20 /var/www/mediawiki/extensions/Cite/src/Hooks/CiteParserTagHooks.php(75): Cite\Cite->references()
#21 /var/www/mediawiki/includes/parser/Parser.php(3993): Cite\Hooks\CiteParserTagHooks->references()
#22 /var/www/mediawiki/includes/parser/CoreParserFunctions.php(1549): MediaWiki\Parser\Parser->extensionSubstitution()
#23 /var/www/mediawiki/includes/parser/Parser.php(3406): MediaWiki\Parser\CoreParserFunctions::tagObj()
#24 /var/www/mediawiki/includes/parser/Parser.php(3061): MediaWiki\Parser\Parser->callParserFunction()
#25 /var/www/mediawiki/includes/parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution()
#26 /var/www/mediawiki/includes/parser/PPTemplateFrame_Hash.php(86): MediaWiki\Parser\PPFrame_Hash->expand()
#27 /var/www/mediawiki/includes/parser/Parser.php(3259): MediaWiki\Parser\PPTemplateFrame_Hash->cachedExpand()
#28 /var/www/mediawiki/includes/parser/PPFrame_Hash.php(266): MediaWiki\Parser\Parser->braceSubstitution()
#29 /var/www/mediawiki/includes/parser/Parser.php(2884): MediaWiki\Parser\PPFrame_Hash->expand()
#30 /var/www/mediawiki/includes/parser/Parser.php(1519): MediaWiki\Parser\Parser->replaceVariables()
#31 /var/www/mediawiki/includes/parser/Parser.php(606): MediaWiki\Parser\Parser->internalParse()
#32 /var/www/mediawiki/includes/content/WikitextContentHandler.php(375): MediaWiki\Parser\Parser->parse()
#33 /var/www/mediawiki/includes/content/ContentHandler.php(1574): MediaWiki\Content\WikitextContentHandler->fillParserOutput()
#34 /var/www/mediawiki/includes/content/Renderer/ContentRenderer.php(67): MediaWiki\Content\ContentHandler->getParserOutput()
#35 /var/www/mediawiki/includes/Revision/RenderedRevision.php(246): MediaWiki\Content\Renderer\ContentRenderer->getParserOutput()
#36 /var/www/mediawiki/includes/Revision/RenderedRevision.php(219): MediaWiki\Revision\RenderedRevision->getSlotParserOutputUncached()
#37 /var/www/mediawiki/includes/Revision/RevisionRenderer.php(225): MediaWiki\Revision\RenderedRevision->getSlotParserOutput()
#38 /var/www/mediawiki/includes/Revision/RevisionRenderer.php(158): MediaWiki\Revision\RevisionRenderer->combineSlotOutput()
#39 /var/www/mediawiki/includes/Revision/RenderedRevision.php(182): MediaWiki\Revision\RevisionRenderer->MediaWiki\Revision\{closure}()
#40 /var/www/mediawiki/includes/page/ParserOutputAccess.php(586): MediaWiki\Revision\RenderedRevision->getRevisionParserOutput()
#41 /var/www/mediawiki/includes/page/ParserOutputAccess.php(672): MediaWiki\Page\ParserOutputAccess->renderRevision()
#42 /var/www/mediawiki/includes/poolcounter/PoolCounterWorkViaCallback.php(68): MediaWiki\Page\ParserOutputAccess->MediaWiki\Page\{closure}()
#43 /var/www/mediawiki/includes/poolcounter/PoolCounterWork.php(159): MediaWiki\PoolCounter\PoolCounterWorkViaCallback->doWork()
#44 /var/www/mediawiki/includes/page/ParserOutputAccess.php(489): MediaWiki\PoolCounter\PoolCounterWork->execute()
#45 /var/www/mediawiki/includes/page/Article.php(824): MediaWiki\Page\ParserOutputAccess->getParserOutput()
#46 /var/www/mediawiki/includes/page/Article.php(537): MediaWiki\Page\Article->generateContentOutput()
#47 /var/www/mediawiki/includes/actions/ViewAction.php(71): MediaWiki\Page\Article->view()
#48 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(734): MediaWiki\Actions\ViewAction->show()
#49 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(505): MediaWiki\Actions\ActionEntryPoint->performAction()
#50 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(143): MediaWiki\Actions\ActionEntryPoint->performRequest()
#51 /var/www/mediawiki/includes/MediaWikiEntryPoint.php(184): MediaWiki\Actions\ActionEntryPoint->execute()
#52 /var/www/mediawiki/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#53 {main}

Exception caught inside exception handler: [3a4c427ae5b2103026cad363] /wiki/Paralaje Error: Class "Wikibase\Client\NamespaceChecker" not found
Backtrace:
from /var/www/mediawiki/extensions/Wikibase/client/WikibaseClient.ServiceWiring.php(617)
#0 /var/www/mediawiki/vendor/wikimedia/services/src/ServiceContainer.php(440): Wikimedia\Services\ServiceContainer->{closure}()
#1 /var/www/mediawiki/vendor/wikimedia/services/src/ServiceContainer.php(406): Wikimedia\Services\ServiceContainer->createService()
#2 /var/www/mediawiki/includes/MediaWikiServices.php(372): Wikimedia\Services\ServiceContainer->getService()
#3 /var/www/mediawiki/vendor/wikimedia/services/src/ServiceContainer.php(414): MediaWiki\MediaWikiServices->getService()
#4 /var/www/mediawiki/vendor/wikimedia/object-factory/src/ObjectFactory.php(204): Wikimedia\Services\ServiceContainer->get()
#5 /var/www/mediawiki/vendor/wikimedia/object-factory/src/ObjectFactory.php(149): Wikimedia\ObjectFactory\ObjectFactory::getObjectFromSpec()
#6 /var/www/mediawiki/includes/HookContainer/HookContainer.php(231): Wikimedia\ObjectFactory\ObjectFactory->createObject()
#7 /var/www/mediawiki/includes/HookContainer/HookContainer.php(289): MediaWiki\HookContainer\HookContainer->makeExtensionHandlerCallback()
#8 /var/www/mediawiki/includes/HookContainer/HookContainer.php(412): MediaWiki\HookContainer\HookContainer->normalizeHandler()
#9 /var/www/mediawiki/includes/HookContainer/HookContainer.php(127): MediaWiki\HookContainer\HookContainer->getHandlers()
#10 /var/www/mediawiki/includes/HookContainer/HookRunner.php(1051): MediaWiki\HookContainer\HookContainer->run()
#11 /var/www/mediawiki/includes/Output/OutputPage.php(3289): MediaWiki\HookContainer\HookRunner->onBeforePageDisplay()
#12 /var/www/mediawiki/includes/exception/MWExceptionRenderer.php(185): MediaWiki\Output\OutputPage->output()
#13 /var/www/mediawiki/includes/exception/MWExceptionRenderer.php(103): MediaWiki\Exception\MWExceptionRenderer::reportHTML()
#14 /var/www/mediawiki/includes/exception/MWExceptionHandler.php(123): MediaWiki\Exception\MWExceptionRenderer::output()
#15 /var/www/mediawiki/includes/exception/MWExceptionHandler.php(224): MediaWiki\Exception\MWExceptionHandler::report()
#16 /var/www/mediawiki/includes/MediaWikiEntryPoint.php(204): MediaWiki\Exception\MWExceptionHandler::handleException()
#17 /var/www/mediawiki/includes/actions/ActionEntryPoint.php(79): MediaWiki\MediaWikiEntryPoint->handleTopLevelError()
#18 /var/www/mediawiki/includes/MediaWikiEntryPoint.php(190): MediaWiki\Actions\ActionEntryPoint->handleTopLevelError()
#19 /var/www/mediawiki/index.php(44): MediaWiki\MediaWikiEntryPoint->run()
#20 {main}