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_DBQueryError",
        "info": "[d2e9281b9fb3b8fb29d3e870] Exception caught: A database query error has occurred. This may indicate a bug in the software.",
        "errorclass": "Wikimedia\\Rdbms\\DBQueryError",
        "*": "Wikimedia\\Rdbms\\DBQueryError at /var/www/html/includes/libs/rdbms/database/Database.php(1198)\nfrom /var/www/html/includes/libs/rdbms/database/Database.php(1198)\n#0 /var/www/html/includes/libs/rdbms/database/Database.php(1182): Wikimedia\\Rdbms\\Database->getQueryException(string, int, string, string)\n#1 /var/www/html/includes/libs/rdbms/database/Database.php(1156): Wikimedia\\Rdbms\\Database->getQueryExceptionAndLog(string, int, string, string)\n#2 /var/www/html/includes/libs/rdbms/database/Database.php(647): Wikimedia\\Rdbms\\Database->reportQueryError(string, int, string, string, bool)\n#3 /var/www/html/includes/libs/rdbms/database/Database.php(1718): Wikimedia\\Rdbms\\Database->query(Wikimedia\\Rdbms\\Query, string)\n#4 /var/www/html/includes/libs/rdbms/database/DBConnRef.php(127): Wikimedia\\Rdbms\\Database->delete(string, array, string)\n#5 /var/www/html/includes/libs/rdbms/database/DBConnRef.php(581): Wikimedia\\Rdbms\\DBConnRef->__call(string, array)\n#6 /var/www/html/includes/libs/rdbms/querybuilder/DeleteQueryBuilder.php(232): Wikimedia\\Rdbms\\DBConnRef->delete(string, array, string)\n#7 /var/www/html/includes/language/LCStoreDB.php(98): Wikimedia\\Rdbms\\DeleteQueryBuilder->execute()\n#8 /var/www/html/includes/language/LocalisationCache.php(1295): LCStoreDB->finishWrite()\n#9 /var/www/html/includes/language/LocalisationCache.php(614): LocalisationCache->recache(string)\n#10 /var/www/html/includes/language/LocalisationCache.php(479): LocalisationCache->initLanguage(string)\n#11 /var/www/html/includes/language/LocalisationCache.php(517): LocalisationCache->loadItem(string, string)\n#12 /var/www/html/includes/language/LocalisationCache.php(403): LocalisationCache->loadSubitem(string, string, string)\n#13 /var/www/html/includes/language/Language.php(3078): LocalisationCache->getSubitem(string, string, string)\n#14 /var/www/html/includes/parser/MagicWord.php(103): MediaWiki\\Language\\Language->getMagic(MediaWiki\\Parser\\MagicWord)\n#15 /var/www/html/includes/parser/MagicWordFactory.php(177): MediaWiki\\Parser\\MagicWord->load(string)\n#16 /var/www/html/includes/content/WikitextContentHandler.php(308): MediaWiki\\Parser\\MagicWordFactory->get(string)\n#17 /var/www/html/includes/content/WikitextContent.php(174): MediaWiki\\Content\\WikitextContentHandler->extractRedirectTargetAndText(MediaWiki\\Content\\WikitextContent)\n#18 /var/www/html/includes/content/ContentHandler.php(1688): MediaWiki\\Content\\WikitextContent->getRedirectTarget()\n#19 /var/www/html/includes/content/Renderer/ContentRenderer.php(79): MediaWiki\\Content\\ContentHandler->getParserOutput(MediaWiki\\Content\\WikitextContent, MediaWiki\\Content\\Renderer\\ContentParseParams)\n#20 /var/www/html/includes/api/ApiParse.php(156): MediaWiki\\Content\\Renderer\\ContentRenderer->getParserOutput(MediaWiki\\Content\\WikitextContent, MediaWiki\\Title\\Title, null, MediaWiki\\Parser\\ParserOptions)\n#21 /var/www/html/includes/poolcounter/PoolCounterWorkViaCallback.php(73): MediaWiki\\Api\\ApiParse->MediaWiki\\Api\\{closure}()\n#22 /var/www/html/includes/poolcounter/PoolCounterWork.php(171): MediaWiki\\PoolCounter\\PoolCounterWorkViaCallback->doWork()\n#23 /var/www/html/includes/api/ApiParse.php(164): MediaWiki\\PoolCounter\\PoolCounterWork->execute()\n#24 /var/www/html/includes/api/ApiParse.php(442): MediaWiki\\Api\\ApiParse->getContentParserOutput(MediaWiki\\Content\\WikitextContent, MediaWiki\\Title\\Title, null, MediaWiki\\Parser\\ParserOptions)\n#25 /var/www/html/includes/api/ApiMain.php(1975): MediaWiki\\Api\\ApiParse->execute()\n#26 /var/www/html/includes/api/ApiMain.php(943): MediaWiki\\Api\\ApiMain->executeAction()\n#27 /var/www/html/includes/api/ApiMain.php(914): MediaWiki\\Api\\ApiMain->executeActionWithErrorHandling()\n#28 /var/www/html/includes/api/ApiEntryPoint.php(153): MediaWiki\\Api\\ApiMain->execute()\n#29 /var/www/html/includes/MediaWikiEntryPoint.php(200): MediaWiki\\Api\\ApiEntryPoint->execute()\n#30 /var/www/html/api.php(44): MediaWiki\\MediaWikiEntryPoint->run()\n#31 {main}"
    }
}