I will update or downgrade your WordPress version that you need. also if you need to update your WordPress theme version I will do that too.
let me tell details about this :
Currently WordPress has version 4.6 . if you are using WordPress latest version you may have problem with visual composer or page builder or fusion builder or any thing like that . Or there is not any update button in WordPress dashboard.
Contact me and tel me your site issue. I will keep a backup in your server before doing the task.
Will solve that in 1hour to 18 hour.