MediaWiki API result

This is the HTML representation of the JSON format. HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format. To see the non-HTML representation of the JSON format, set format=json.
See the complete documentation, or the API help for more information.
{
    "error": {
        "code": "internal_api_error_DBConnectionError",
        "info": "[5e66c89e99c8435c17f0c12a] Exception caught: A database query error has occurred. This may indicate a bug in the software.",
        "errorclass": "Wikimedia\\Rdbms\\DBConnectionError",
        "*": "Wikimedia\\Rdbms\\DBConnectionError at /var/www/html/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1129)\nfrom /var/www/html/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1129)\n#0 /var/www/html/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(796): Wikimedia\\Rdbms\\LoadBalancer->reportConnectionError()\n#1 /var/www/html/mediawiki/includes/libs/rdbms/loadbalancer/LoadBalancer.php(784): Wikimedia\\Rdbms\\LoadBalancer->getServerConnection()\n#2 /var/www/html/mediawiki/includes/libs/rdbms/database/DBConnRef.php(107): Wikimedia\\Rdbms\\LoadBalancer->getConnectionInternal()\n#3 /var/www/html/mediawiki/includes/libs/rdbms/database/DBConnRef.php(125): Wikimedia\\Rdbms\\DBConnRef->ensureConnection()\n#4 /var/www/html/mediawiki/includes/libs/rdbms/database/DBConnRef.php(351): Wikimedia\\Rdbms\\DBConnRef->__call()\n#5 /var/www/html/mediawiki/includes/libs/rdbms/querybuilder/SelectQueryBuilder.php(744): Wikimedia\\Rdbms\\DBConnRef->select()\n#6 /var/www/html/mediawiki/includes/page/PageProps.php(122): Wikimedia\\Rdbms\\SelectQueryBuilder->fetchResultSet()\n#7 /var/www/html/mediawiki/extensions/DisplayTitle/includes/DisplayTitleService.php(204): MediaWiki\\Page\\PageProps->getProperties()\n#8 /var/www/html/mediawiki/extensions/DisplayTitle/includes/DisplayTitleService.php(171): MediaWiki\\Extension\\DisplayTitle\\DisplayTitleService->getDisplayTitle()\n#9 /var/www/html/mediawiki/extensions/DisplayTitle/includes/DisplayTitleHooks.php(138): MediaWiki\\Extension\\DisplayTitle\\DisplayTitleService->handleLink()\n#10 /var/www/html/mediawiki/includes/HookContainer/HookContainer.php(159): MediaWiki\\Extension\\DisplayTitle\\DisplayTitleHooks->onHtmlPageLinkRendererBegin()\n#11 /var/www/html/mediawiki/includes/HookContainer/HookRunner.php(2096): MediaWiki\\HookContainer\\HookContainer->run()\n#12 /var/www/html/mediawiki/includes/linker/LinkRenderer.php(194): MediaWiki\\HookContainer\\HookRunner->onHtmlPageLinkRendererBegin()\n#13 /var/www/html/mediawiki/includes/linker/LinkRenderer.php(232): MediaWiki\\Linker\\LinkRenderer->runBeginHook()\n#14 /var/www/html/mediawiki/includes/linker/LinkRenderer.php(295): MediaWiki\\Linker\\LinkRenderer->makePreloadedLink()\n#15 /var/www/html/mediawiki/includes/skins/components/SkinComponentCopyright.php(62): MediaWiki\\Linker\\LinkRenderer->makeKnownLink()\n#16 /var/www/html/mediawiki/includes/skins/components/SkinComponentCopyright.php(43): MediaWiki\\Skin\\SkinComponentCopyright->getCopyrightHTML()\n#17 /var/www/html/mediawiki/includes/skins/Skin.php(215): MediaWiki\\Skin\\SkinComponentCopyright->getTemplateData()\n#18 /var/www/html/mediawiki/includes/skins/SkinTemplate.php(187): Skin->getTemplateData()\n#19 /var/www/html/mediawiki/includes/skins/SkinMustache.php(131): SkinTemplate->getTemplateData()\n#20 /var/www/html/mediawiki/includes/skins/SkinMustache.php(93): SkinMustache->getTemplateData()\n#21 /var/www/html/mediawiki/includes/skins/SkinTemplate.php(180): SkinMustache->generateHTML()\n#22 /var/www/html/mediawiki/includes/skins/Skin.php(684): SkinTemplate->outputPage()\n#23 /var/www/html/mediawiki/includes/Output/OutputPage.php(3193): Skin->outputPageFinal()\n#24 /var/www/html/mediawiki/includes/api/ApiHelp.php(89): MediaWiki\\Output\\OutputPage->output()\n#25 /var/www/html/mediawiki/includes/api/ApiMain.php(1975): MediaWiki\\Api\\ApiHelp->execute()\n#26 /var/www/html/mediawiki/includes/api/ApiMain.php(943): MediaWiki\\Api\\ApiMain->executeAction()\n#27 /var/www/html/mediawiki/includes/api/ApiMain.php(914): MediaWiki\\Api\\ApiMain->executeActionWithErrorHandling()\n#28 /var/www/html/mediawiki/includes/api/ApiEntryPoint.php(153): MediaWiki\\Api\\ApiMain->execute()\n#29 /var/www/html/mediawiki/includes/MediaWikiEntryPoint.php(200): MediaWiki\\Api\\ApiEntryPoint->execute()\n#30 /var/www/html/mediawiki/api.php(44): MediaWiki\\MediaWikiEntryPoint->run()\n#31 {main}"
    }
}