MediaWiki internal error.

Original exception: [2ca62f2cb621561414f97ace] /es/w/index.php?title=California_Lawyers_101&feed=atom&action=history Error from line 657 of /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php: Class 'FormatJson' not found
Backtrace:
#0 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(195): MWExceptionHandler::logError()
#1 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/AutoLoader.php(81): MWExceptionHandler::handleError()
#2 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/AutoLoader.php(81): require()
#3 [internal function]: AutoLoader::autoload()
#4 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(621): spl_autoload_call()
#5 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(111): MWExceptionHandler::logException()
#6 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(129): MWExceptionHandler::rollbackMasterChangesAndLog()
#7 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/MediaWiki.php(550): MWExceptionHandler::handleException()
#8 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/index.php(43): MediaWiki->run()
#9 {main}

Exception caught inside exception handler: [2ca62f2cb621561414f97ace] /es/w/index.php?title=California_Lawyers_101&feed=atom&action=history Wikimedia\Rdbms\DBQueryError from line 1149 of /usr/share/nginx/html/ysmwiki.dip.jp/es/w/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?
Query: SELECT page_title,page_latest FROM `mw16_page` WHERE page_is_redirect = '0' AND page_namespace = '8' AND (page_title NOT LIKE '%/%' ESCAPE '`' ) AND (page_len > 10000)
Function: MessageCache::loadFromDB(es)-big
Error: 1146 Table 'ysmwiki-es.mw16_page' doesn't exist (localhost)

Backtrace:
#0 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/libs/rdbms/database/Database.php(979): Wikimedia\Rdbms\Database->reportQueryError()
#1 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/libs/rdbms/database/Database.php(1343): Wikimedia\Rdbms\Database->query()
#2 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(512): Wikimedia\Rdbms\Database->select()
#3 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(426): MessageCache->loadFromDB()
#4 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(350): MessageCache->loadFromDBWithLock()
#5 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(991): MessageCache->load()
#6 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(919): MessageCache->getMsgFromNamespace()
#7 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(888): MessageCache->getMessageForLang()
#8 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/cache/MessageCache.php(828): MessageCache->getMessageFromFallbackChain()
#9 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/Message.php(1275): MessageCache->get()
#10 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/Message.php(842): Message->fetchMessage()
#11 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/Message.php(934): Message->toString()
#12 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/OutputPage.php(950): Message->text()
#13 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/OutputPage.php(997): OutputPage->setHTMLTitle()
#14 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/OutputPage.php(2478): OutputPage->setPageTitle()
#15 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionRenderer.php(126): OutputPage->prepareErrorPage()
#16 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionRenderer.php(54): MWExceptionRenderer::reportHTML()
#17 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(75): MWExceptionRenderer::output()
#18 /usr/share/nginx/html/ysmwiki.dip.jp/es/w/includes/exception/MWExceptionHandler.php(130): MWExceptionHandler::report()
#19 [internal function]: MWExceptionHandler::handleException()
#20 {main}