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": "[5d42ff7c8fdcca0db867e495] 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/projectmailer/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1477)\nfrom /var/www/projectmailer/includes/libs/rdbms/loadbalancer/LoadBalancer.php(1477)\n#0 /var/www/projectmailer/includes/libs/rdbms/loadbalancer/LoadBalancer.php(972): Wikimedia\\Rdbms\\LoadBalancer->reportConnectionError()\n#1 /var/www/projectmailer/includes/libs/rdbms/loadbalancer/LoadBalancer.php(944): Wikimedia\\Rdbms\\LoadBalancer->getServerConnection()\n#2 /var/www/projectmailer/includes/libs/rdbms/database/DBConnRef.php(95): Wikimedia\\Rdbms\\LoadBalancer->getConnectionInternal()\n#3 /var/www/projectmailer/includes/libs/rdbms/database/DBConnRef.php(101): Wikimedia\\Rdbms\\DBConnRef->ensureConnection()\n#4 /var/www/projectmailer/includes/libs/rdbms/database/DBConnRef.php(706): Wikimedia\\Rdbms\\DBConnRef->__call()\n#5 /var/www/projectmailer/includes/libs/rdbms/database/Database.php(3151): Wikimedia\\Rdbms\\DBConnRef->getSessionLagStatus()\n#6 /usr/local/share/mediawiki/extensions/Gadgets/includes/MediaWikiGadgetsDefinitionRepo.php(112): Wikimedia\\Rdbms\\Database::getCacheSetOptions()\n#7 /var/www/projectmailer/includes/libs/objectcache/wancache/WANObjectCache.php(1689): MediaWiki\\Extension\\Gadgets\\MediaWikiGadgetsDefinitionRepo->MediaWiki\\Extension\\Gadgets\\{closure}()\n#8 /var/www/projectmailer/includes/libs/objectcache/wancache/WANObjectCache.php(1522): WANObjectCache->fetchOrRegenerate()\n#9 /usr/local/share/mediawiki/extensions/Gadgets/includes/MediaWikiGadgetsDefinitionRepo.php(118): WANObjectCache->getWithSetCallback()\n#10 /var/www/projectmailer/includes/libs/objectcache/BagOStuff.php(216): MediaWiki\\Extension\\Gadgets\\MediaWikiGadgetsDefinitionRepo->MediaWiki\\Extension\\Gadgets\\{closure}()\n#11 /usr/local/share/mediawiki/extensions/Gadgets/includes/MediaWikiGadgetsDefinitionRepo.php(121): BagOStuff->getWithSetCallback()\n#12 /usr/local/share/mediawiki/extensions/Gadgets/includes/MediaWikiGadgetsDefinitionRepo.php(42): MediaWiki\\Extension\\Gadgets\\MediaWikiGadgetsDefinitionRepo->loadGadgets()\n#13 /usr/local/share/mediawiki/extensions/Gadgets/includes/GadgetRepo.php(70): MediaWiki\\Extension\\Gadgets\\MediaWikiGadgetsDefinitionRepo->getGadgetIds()\n#14 /usr/local/share/mediawiki/extensions/Gadgets/includes/Hooks.php(128): MediaWiki\\Extension\\Gadgets\\GadgetRepo->getStructuredList()\n#15 /var/www/projectmailer/includes/HookContainer/HookContainer.php(160): MediaWiki\\Extension\\Gadgets\\Hooks->onUserGetDefaultOptions()\n#16 /var/www/projectmailer/includes/HookContainer/HookRunner.php(4158): MediaWiki\\HookContainer\\HookContainer->run()\n#17 /var/www/projectmailer/includes/user/DefaultOptionsLookup.php(110): MediaWiki\\HookContainer\\HookRunner->onUserGetDefaultOptions()\n#18 /var/www/projectmailer/includes/user/UserOptionsManager.php(596): MediaWiki\\User\\DefaultOptionsLookup->getDefaultOptions()\n#19 /var/www/projectmailer/includes/user/UserOptionsManager.php(498): MediaWiki\\User\\UserOptionsManager->loadOriginalOptions()\n#20 /var/www/projectmailer/includes/user/UserOptionsManager.php(148): MediaWiki\\User\\UserOptionsManager->loadUserOptions()\n#21 /var/www/projectmailer/includes/context/RequestContext.php(460): MediaWiki\\User\\UserOptionsManager->getOption()\n#22 /var/www/projectmailer/includes/context/DerivativeContext.php(294): RequestContext->getLanguage()\n#23 /var/www/projectmailer/includes/language/Message.php(814): DerivativeContext->getLanguage()\n#24 /var/www/projectmailer/includes/context/DerivativeContext.php(326): Message->setContext()\n#25 /var/www/projectmailer/includes/context/ContextSource.php(210): DerivativeContext->msg()\n#26 /var/www/projectmailer/includes/api/ApiFeedRecentChanges.php(132): ContextSource->msg()\n#27 /var/www/projectmailer/includes/api/ApiFeedRecentChanges.php(91): ApiFeedRecentChanges->getFeedObject()\n#28 /var/www/projectmailer/includes/api/ApiMain.php(1900): ApiFeedRecentChanges->execute()\n#29 /var/www/projectmailer/includes/api/ApiMain.php(875): ApiMain->executeAction()\n#30 /var/www/projectmailer/includes/api/ApiMain.php(846): ApiMain->executeActionWithErrorHandling()\n#31 /var/www/projectmailer/api.php(90): ApiMain->execute()\n#32 /var/www/projectmailer/api.php(45): wfApiMain()\n#33 {main}"
    }
}