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": "[3c51e7e3a7cfa309f156ae2c] 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(381): LocalisationCache->loadItem(string, string)\n#12 /var/www/html/includes/language/Language.php(560): LocalisationCache->getItem(string, string)\n#13 /var/www/html/includes/title/MediaWikiTitleCodec.php(120): MediaWiki\\Language\\Language->needsGenderDistinction()\n#14 /var/www/html/includes/title/MediaWikiTitleCodec.php(157): MediaWiki\\Title\\MediaWikiTitleCodec->getNamespaceName(int, string)\n#15 /var/www/html/includes/title/MediaWikiTitleCodec.php(295): MediaWiki\\Title\\MediaWikiTitleCodec->formatTitle(int, string, string, string)\n#16 /var/www/html/includes/cache/LinkCache.php(154): MediaWiki\\Title\\MediaWikiTitleCodec->getPrefixedDBkey(MediaWiki\\Title\\Title)\n#17 /var/www/html/includes/cache/LinkCache.php(273): MediaWiki\\Cache\\LinkCache->getCacheKey(MediaWiki\\Title\\Title)\n#18 /var/www/html/includes/api/ApiPageSet.php(946): MediaWiki\\Cache\\LinkCache->addGoodLinkObjFromRow(MediaWiki\\Title\\Title, stdClass)\n#19 /var/www/html/includes/api/ApiPageSet.php(1073): MediaWiki\\Api\\ApiPageSet->processDbRow(stdClass)\n#20 /var/www/html/includes/api/ApiPageSet.php(1037): MediaWiki\\Api\\ApiPageSet->initFromQueryResult(Wikimedia\\Rdbms\\MysqliResultWrapper, array, bool)\n#21 /var/www/html/includes/api/ApiPageSet.php(914): MediaWiki\\Api\\ApiPageSet->initFromPageIds(array)\n#22 /var/www/html/includes/api/ApiQueryAllLinks.php(313): MediaWiki\\Api\\ApiPageSet->populateFromPageIDs(array)\n#23 /var/www/html/includes/api/ApiQueryAllLinks.php(120): MediaWiki\\Api\\ApiQueryAllLinks->run(MediaWiki\\Api\\ApiPageSet)\n#24 /var/www/html/includes/api/ApiPageSet.php(287): MediaWiki\\Api\\ApiQueryAllLinks->executeGenerator(MediaWiki\\Api\\ApiPageSet)\n#25 /var/www/html/includes/api/ApiPageSet.php(250): MediaWiki\\Api\\ApiPageSet->executeInternal(bool)\n#26 /var/www/html/includes/api/ApiQuery.php(691): MediaWiki\\Api\\ApiPageSet->execute()\n#27 /var/www/html/includes/api/ApiMain.php(1975): MediaWiki\\Api\\ApiQuery->execute()\n#28 /var/www/html/includes/api/ApiMain.php(943): MediaWiki\\Api\\ApiMain->executeAction()\n#29 /var/www/html/includes/api/ApiMain.php(914): MediaWiki\\Api\\ApiMain->executeActionWithErrorHandling()\n#30 /var/www/html/includes/api/ApiEntryPoint.php(153): MediaWiki\\Api\\ApiMain->execute()\n#31 /var/www/html/includes/MediaWikiEntryPoint.php(200): MediaWiki\\Api\\ApiEntryPoint->execute()\n#32 /var/www/html/api.php(44): MediaWiki\\MediaWikiEntryPoint->run()\n#33 {main}"
    }
}