[XfHkAawQBGoAAA1QNLcAAAAA] Exception caught: Class 'Wikibase\\Client\\WikibaseClient' not found `internal_api_error_Error`, served by `deployment-mediawiki-09`
On the beta cluster, not production; formatversion=2 can be omitted, same error occurs
Versions: mediawiki@e41bc16e3164c3b1db2e875c2ce11d9224a0ba0f, math@205527c05a92cd524d5dd0cbd3a3e4e3721b53a4
Error at /srv/mediawiki/php-master/extensions/Math/src/MathWikibaseConfig.php(147)
#0 /srv/mediawiki/php-master/extensions/Math/src/ApiMathWikibaseExtracts.php(24): MathWikibaseConfig::getDefaultMathWikibaseConfig()
#1 /srv/mediawiki/php-master/vendor/wikimedia/object-factory/src/ObjectFactory.php(184): ApiMathWikibaseExtracts->__construct(ApiQuery, string)
#2 /srv/mediawiki/php-master/vendor/wikimedia/object-factory/src/ObjectFactory.php(102): Wikimedia\\ObjectFactory::getObjectFromSpec(array, array)
#3 /srv/mediawiki/php-master/includes/api/ApiModuleManager.php(183): Wikimedia\\ObjectFactory->createObject(array, array)
#4 /srv/mediawiki/php-master/includes/api/ApiModuleManager.php(155): ApiModuleManager->instantiateModule(string, array)
#5 /srv/mediawiki/php-master/includes/api/ApiBase.php(622): ApiModuleManager->getModule(string)
#6 /srv/mediawiki/php-master/includes/api/ApiBase.php(2418): ApiBase->getModuleFromPath(string)
#7 /srv/mediawiki/php-master/includes/api/ApiHelp.php(448): ApiBase->getFinalParamDescription()
#8 /srv/mediawiki/php-master/includes/api/ApiHelp.php(165): ApiHelp::getHelpInternal(DerivativeContext, array, array, array)
#9 /srv/mediawiki/php-master/includes/api/ApiHelp.php(52): ApiHelp::getHelp(DerivativeContext, array, array)
#10 /srv/mediawiki/php-master/includes/api/ApiMain.php(1603): ApiHelp->execute()
#11 /srv/mediawiki/php-master/includes/api/ApiMain.php(539): ApiMain->executeAction()
#12 /srv/mediawiki/php-master/includes/api/ApiMain.php(510): ApiMain->executeActionWithErrorHandling()
#13 /srv/mediawiki/php-master/api.php(78): ApiMain->execute()
#14 /srv/mediawiki/w/api.php(3): require(string)
#15 {main}