MediaWiki internal error.

Original exception: [d19588ca649f166e1063f528] /-/12hg Wikimedia\Rdbms\DBQueryDisconnectedError from line 1698 of /home/thwikicc/mediawiki/includes/libs/rdbms/database/Database.php: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading?

A connection error occurred during a query.
Query: SELECT page_id,page_len,page_is_redirect,page_latest,page_restrictions,page_content_model,page_namespace,page_title,cl_sortkey,cat_id,cat_title,cat_subcats,cat_pages,cat_files,cl_sortkey_prefix,cl_collation FROM `page` JOIN `categorylinks` FORCE INDEX (cl_sortkey) ON ((cl_from = page_id)) LEFT JOIN `category` ON ((cat_title = page_title) AND page_namespace = 14) WHERE cl_to = '含有受损文件链接的页面' AND cl_type = 'page' ORDER BY cl_sortkey LIMIT 201
Function: CategoryViewer::doCategoryQuery
Error: 2006 MySQL server has gone away (localhost)

Backtrace:
#0 /home/thwikicc/mediawiki/includes/libs/rdbms/database/Database.php(1684): Wikimedia\Rdbms\Database->getQueryException()
#1 /home/thwikicc/mediawiki/includes/libs/rdbms/database/Database.php(1659): Wikimedia\Rdbms\Database->getQueryExceptionAndLog()
#2 /home/thwikicc/mediawiki/includes/libs/rdbms/database/Database.php(1228): Wikimedia\Rdbms\Database->reportQueryError()
#3 /home/thwikicc/mediawiki/includes/libs/rdbms/database/Database.php(1908): Wikimedia\Rdbms\Database->query()
#4 /home/thwikicc/mediawiki/includes/libs/rdbms/database/DBConnRef.php(68): Wikimedia\Rdbms\Database->select()
#5 /home/thwikicc/mediawiki/includes/libs/rdbms/database/DBConnRef.php(313): Wikimedia\Rdbms\DBConnRef->__call()
#6 /home/thwikicc/mediawiki/includes/CategoryViewer.php(349): Wikimedia\Rdbms\DBConnRef->select()
#7 /home/thwikicc/mediawiki/includes/CategoryViewer.php(119): CategoryViewer->doCategoryQuery()
#8 /home/thwikicc/mediawiki/includes/page/CategoryPage.php(114): CategoryViewer->getHTML()
#9 /home/thwikicc/mediawiki/includes/page/CategoryPage.php(66): CategoryPage->closeShowCategory()
#10 /home/thwikicc/mediawiki/includes/actions/ViewAction.php(80): CategoryPage->view()
#11 /home/thwikicc/mediawiki/includes/MediaWiki.php(532): ViewAction->show()
#12 /home/thwikicc/mediawiki/includes/MediaWiki.php(313): MediaWiki->performAction()
#13 /home/thwikicc/mediawiki/includes/MediaWiki.php(945): MediaWiki->performRequest()
#14 /home/thwikicc/mediawiki/includes/MediaWiki.php(548): MediaWiki->main()
#15 /home/thwikicc/mediawiki/index.php(53): MediaWiki->run()
#16 /home/thwikicc/mediawiki/index.php(46): wfIndexMain()
#17 {main}

Exception caught inside exception handler: [d19588ca649f166e1063f528] /-/12hg InvalidArgumentException from line 58 of /home/thwikicc/mediawiki/includes/libs/rdbms/database/DBConnRef.php: Missing lazy connection arguments.
Backtrace:
#0 /home/thwikicc/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1034): Wikimedia\Rdbms\DBConnRef->__construct()
#1 /home/thwikicc/mediawiki/includes/Revision/RevisionStore.php(227): Wikimedia\Rdbms\LoadBalancer->getConnectionRef()
#2 /home/thwikicc/mediawiki/includes/Revision/RevisionStore.php(2880): MediaWiki\Revision\RevisionStore->getDBConnectionRef()
#3 /home/thwikicc/mediawiki/includes/page/WikiPage.php(746): MediaWiki\Revision\RevisionStore->getKnownCurrentRevision()
#4 /home/thwikicc/mediawiki/includes/page/WikiPage.php(782): WikiPage->loadLastEdit()
#5 /home/thwikicc/mediawiki/includes/page/WikiPage.php(638): WikiPage->getRevisionRecord()
#6 /home/thwikicc/mediawiki/includes/libs/objectcache/wancache/WANObjectCache.php(1529): WikiPage->{closure}()
#7 /home/thwikicc/mediawiki/includes/libs/objectcache/wancache/WANObjectCache.php(1376): WANObjectCache->fetchOrRegenerate()
#8 /home/thwikicc/mediawiki/includes/page/WikiPage.php(651): WANObjectCache->getWithSetCallback()
#9 /home/thwikicc/mediawiki/includes/page/WikiPage.php(311): WikiPage->getContentModel()
#10 /home/thwikicc/mediawiki/includes/page/WikiPage.php(297): WikiPage->getContentHandler()
#11 /home/thwikicc/mediawiki/includes/page/Article.php(2550): WikiPage->getActionOverrides()
#12 /home/thwikicc/mediawiki/includes/actions/Action.php(130): Article->getActionOverrides()
#13 /home/thwikicc/mediawiki/includes/actions/Action.php(189): Action::factory()
#14 /home/thwikicc/mediawiki/extensions/CharInsert/includes/CharInsert.php(24): Action::getActionName()
#15 /home/thwikicc/mediawiki/includes/HookContainer/HookContainer.php(329): MediaWiki\Extensions\CharInsert\CharInsert::onBeforePageDisplay()
#16 /home/thwikicc/mediawiki/includes/HookContainer/HookContainer.php(132): MediaWiki\HookContainer\HookContainer->callLegacyHook()
#17 /home/thwikicc/mediawiki/includes/HookContainer/HookRunner.php(991): MediaWiki\HookContainer\HookContainer->run()
#18 /home/thwikicc/mediawiki/includes/OutputPage.php(2617): MediaWiki\HookContainer\HookRunner->onBeforePageDisplay()
#19 /home/thwikicc/mediawiki/includes/exception/MWExceptionRenderer.php(153): OutputPage->output()
#20 /home/thwikicc/mediawiki/includes/exception/MWExceptionRenderer.php(65): MWExceptionRenderer::reportHTML()
#21 /home/thwikicc/mediawiki/includes/exception/MWExceptionHandler.php(106): MWExceptionRenderer::output()
#22 /home/thwikicc/mediawiki/includes/exception/MWExceptionHandler.php(185): MWExceptionHandler::report()
#23 /home/thwikicc/mediawiki/includes/MediaWiki.php(581): MWExceptionHandler::handleException()
#24 /home/thwikicc/mediawiki/index.php(53): MediaWiki->run()
#25 /home/thwikicc/mediawiki/index.php(46): wfIndexMain()
#26 {main}