MediaWiki internal error.

Original exception: [YiN2-PBBISUNpB4E@4sc0wAAAKg] /bullpen/Springfield_Rifles InvalidArgumentException from line 58 of /home/br/www/bpv/includes/libs/rdbms/database/DBConnRef.php: Missing lazy connection arguments.
Backtrace:
#0 /home/br/www/bpv/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1046): Wikimedia\Rdbms\DBConnRef->__construct(Wikimedia\Rdbms\LoadBalancer, boolean, integer)
#1 /home/br/www/bpv/includes/GlobalFunctions.php(2469): Wikimedia\Rdbms\LoadBalancer->getMaintenanceConnectionRef(integer, array, string)
#2 /home/br/www/bpv/includes/resourceloader/ResourceLoaderWikiModule.php(165): wfGetDB(integer)
#3 /home/br/www/bpv/includes/resourceloader/ResourceLoaderWikiModule.php(471): ResourceLoaderWikiModule->getDB()
#4 /home/br/www/bpv/includes/OutputPage.php(3004): ResourceLoaderWikiModule::preloadTitleInfo(ResourceLoaderContext, Wikimedia\Rdbms\MaintainableDBConnRef, array)
#5 /home/br/www/bpv/includes/OutputPage.php(3208): OutputPage->getRlClient()
#6 /home/br/www/bpv/includes/skins/Skin.php(681): OutputPage->getBottomScripts()
#7 /home/br/www/bpv/includes/skins/SkinTemplate.php(388): Skin->bottomScripts()
#8 /home/br/www/bpv/includes/skins/SkinTemplate.php(127): SkinTemplate->prepareQuickTemplate()
#9 /home/br/www/bpv/includes/skins/SkinTemplate.php(144): SkinTemplate->generateHTML()
#10 /home/br/www/bpv/includes/OutputPage.php(2622): SkinTemplate->outputPage()
#11 /home/br/www/bpv/includes/MediaWiki.php(959): OutputPage->output(boolean)
#12 /home/br/www/bpv/includes/MediaWiki.php(972): MediaWiki->{closure}()
#13 /home/br/www/bpv/includes/MediaWiki.php(547): MediaWiki->main()
#14 /home/br/www/bpv/index.php(56): MediaWiki->run()
#15 /home/br/www/bpv/index.php(49): wfIndexMain()
#16 {main}

Exception caught inside exception handler: [YiN2-PBBISUNpB4E@4sc0wAAAKg] /bullpen/Springfield_Rifles InvalidArgumentException from line 58 of /home/br/www/bpv/includes/libs/rdbms/database/DBConnRef.php: Missing lazy connection arguments.
Backtrace:
#0 /home/br/www/bpv/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1031): Wikimedia\Rdbms\DBConnRef->__construct(Wikimedia\Rdbms\LoadBalancer, boolean, integer)
#1 /home/br/www/bpv/includes/cache/LinkBatch.php(253): Wikimedia\Rdbms\LoadBalancer->getConnectionRef(integer)
#2 /home/br/www/bpv/includes/cache/LinkBatch.php(186): LinkBatch->doQuery()
#3 /home/br/www/bpv/includes/cache/LinkBatch.php(175): LinkBatch->executeInto(LinkCache)
#4 /home/br/www/bpv/includes/skins/Skin.php(313): LinkBatch->execute()
#5 /home/br/www/bpv/includes/skins/Skin.php(177): Skin->preloadExistence()
#6 /home/br/www/bpv/skins/Klecko/Klecko.skin.php(22): Skin->initPage(OutputPage)
#7 /home/br/www/bpv/includes/skins/SkinTemplate.php(140): SkinKlecko->initPage(OutputPage)
#8 /home/br/www/bpv/includes/OutputPage.php(2622): SkinTemplate->outputPage()
#9 /home/br/www/bpv/includes/exception/MWExceptionRenderer.php(153): OutputPage->output()
#10 /home/br/www/bpv/includes/exception/MWExceptionRenderer.php(65): MWExceptionRenderer::reportHTML(InvalidArgumentException)
#11 /home/br/www/bpv/includes/exception/MWExceptionHandler.php(106): MWExceptionRenderer::output(InvalidArgumentException, integer)
#12 /home/br/www/bpv/includes/exception/MWExceptionHandler.php(185): MWExceptionHandler::report(InvalidArgumentException)
#13 /home/br/www/bpv/includes/MediaWiki.php(580): MWExceptionHandler::handleException(InvalidArgumentException, string)
#14 /home/br/www/bpv/index.php(56): MediaWiki->run()
#15 /home/br/www/bpv/index.php(49): wfIndexMain()
#16 {main}