I've used this Members plugin on many websites. I installed it on a new site. The plugin is activated, the settings page works, but the 'Roles' page gives me an internal server error... Any idea why this happens?
500 Internal Server Error
The request was not completed. The server met an unexpected condition.
18.104.22.168/~affiches/wordpress/wp-admin/users.php?page=roles (port 80)