Fatal error: Uncaught Error: Class "Wikimedia\Rdbms\LoadBalancer" not found in /var/www/html/orian-wiki/includes/libs/rdbms/loadbalancer/LoadBalancerSingle.php:29
Stack trace:
#0 {main}
thrown in /var/www/html/orian-wiki/includes/libs/rdbms/loadbalancer/LoadBalancerSingle.php on line 29