Membership Error After Upgrade

I'm getting this error after my update:

Warning: Missing argument 2 for wpdb::prepare(), called in D:\WebRoot\Domains\gimpedtutorials.com\wwwroot\wp-content\plugins\membership\membershipincludes\classes\membershippublic.php on line 2312 and defined in D:\WebRoot\Domains\gimpedtutorials.com\wwwroot\wp-includes\wp-db.php on line 990

It's displaying on my website as well. How do I fix this?