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.
{
    "batchcomplete": "",
    "query": {
        "allcategories": [
            {
                "size": 6,
                "pages": 6,
                "files": 0,
                "subcats": 0,
                "*": "ALMA"
            },
            {
                "size": 3,
                "pages": 3,
                "files": 0,
                "subcats": 0,
                "*": "Calibration"
            },
            {
                "size": 1,
                "pages": 1,
                "files": 0,
                "subcats": 0,
                "*": "Category talcategoria"
            },
            {
                "size": 1,
                "pages": 1,
                "files": 0,
                "subcats": 0,
                "*": "Continuum"
            },
            {
                "size": 2,
                "pages": 2,
                "files": 0,
                "subcats": 0,
                "*": "Imaging"
            },
            {
                "size": 8,
                "pages": 0,
                "files": 8,
                "subcats": 0,
                "*": "Meetings"
            },
            {
                "size": 3,
                "pages": 3,
                "files": 0,
                "subcats": 0,
                "*": "Pages with broken file links"
            },
            {
                "size": 6,
                "pages": 6,
                "files": 0,
                "subcats": 0,
                "*": "Polarization"
            },
            {
                "size": 1,
                "pages": 0,
                "files": 1,
                "subcats": 0,
                "*": "Santangelo"
            },
            {
                "size": 100,
                "pages": 0,
                "files": 100,
                "subcats": 0,
                "*": "Uploaded with UploadWizard"
            }
        ]
    }
}{
    "error": {
        "code": "internal_api_error_DBTransactionStateError",
        "info": "[022245a61e2311faa11ed530] Exception caught: A database query error has occurred. This may indicate a bug in the software.",
        "errorclass": "Wikimedia\\Rdbms\\DBTransactionStateError",
        "*": "Wikimedia\\Rdbms\\DBTransactionStateError at /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/TransactionManager.php(203)\nfrom /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/TransactionManager.php(203)\n#0 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/Database.php(1390): Wikimedia\\Rdbms\\TransactionManager->assertTransactionStatus()\n#1 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/Database.php(936): Wikimedia\\Rdbms\\Database->assertQueryIsCurrentlyAllowed()\n#2 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/Database.php(1708): Wikimedia\\Rdbms\\Database->query()\n#3 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/Database.php(1661): Wikimedia\\Rdbms\\Database->select()\n#4 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/DBConnRef.php(103): Wikimedia\\Rdbms\\Database->selectField()\n#5 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/libs/rdbms/database/DBConnRef.php(312): Wikimedia\\Rdbms\\DBConnRef->__call()\n#6 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/LCStoreDB.php(61): Wikimedia\\Rdbms\\DBConnRef->selectField()\n#7 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/LocalisationCache.php(432): LCStoreDB->get()\n#8 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/LocalisationCache.php(335): LocalisationCache->loadSubitem()\n#9 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/MessageCache.php(694): LocalisationCache->getSubitem()\n#10 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/MessageCache.php(1184): MessageCache->isMainCacheable()\n#11 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/MessageCache.php(1088): MessageCache->getMsgFromNamespace()\n#12 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/MessageCache.php(1060): MessageCache->getMessageForLang()\n#13 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/MessageCache.php(999): MessageCache->getMessageFromFallbackChain()\n#14 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/Message.php(1473): MessageCache->get()\n#15 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/Message.php(970): Message->fetchMessage()\n#16 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/language/Message.php(1053): Message->format()\n#17 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/OutputPage.php(1086): Message->text()\n#18 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/api/ApiFormatBase.php(260): OutputPage->setPageTitle()\n#19 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/api/ApiMain.php(2161): ApiFormatBase->closePrinter()\n#20 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/api/ApiMain.php(1908): ApiMain->printResult()\n#21 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/api/ApiMain.php(875): ApiMain->executeAction()\n#22 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/includes/api/ApiMain.php(846): ApiMain->executeActionWithErrorHandling()\n#23 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/api.php(90): ApiMain->execute()\n#24 /var/www/vhosts/www.alma.inaf.it/mediawiki-1.39.1/api.php(45): wfApiMain()\n#25 {main}"
    }
}