Fatal error: Uncaught Error: Class "OOUI\Layout" not found in /var/www/html/orian-wiki/vendor/oojs/oojs-ui/php/layouts/FieldLayout.php:18
Stack trace:
#0 {main}
thrown in /var/www/html/orian-wiki/vendor/oojs/oojs-ui/php/layouts/FieldLayout.php on line 18