PHP Fatal error: Uncaught exception 'MediaWiki\Services\ServiceDisabledException' with message 'Service disabled: DBLoadBalancerFactory' in /home/katie/src/mediawiki/core/includes/Services/ServiceContainer.php:340
Stack trace:
#0 /home/katie/src/mediawiki/core/includes/MediaWikiServices.php(497): MediaWiki\Services\ServiceContainer->getService('DBLoadBalancerF...')
#1 /home/katie/src/mediawiki/core/includes/exception/MWExceptionHandler.php(83): MediaWiki\MediaWikiServices->getDBLoadBalancerFactory()
#2 /home/katie/src/mediawiki/core/includes/exception/MWExceptionHandler.php(114): MWExceptionHandler::rollbackMasterChangesAndLog(Object(InvalidArgumentException))
#3 [internal function]: MWExceptionHandler::handleException(Object(InvalidArgumentException))
#4 {main}
thrown in /home/katie/src/mediawiki/core/includes/Services/ServiceContainer.php on line 340