Fatal error: Uncaught Error: Class "OOUI\Widget" not found in /var/www/html/orian-wiki/vendor/oojs/oojs-ui/php/widgets/OptionWidget.php:11
Stack trace:
#0 {main}
thrown in /var/www/html/orian-wiki/vendor/oojs/oojs-ui/php/widgets/OptionWidget.php on line 11