Theme causing problems


I have a site

Wpmudev dashboard is installed there

I cannot reach the theme author.

There are many problems in the site. which lead to pages displaying blank screen

also this link for instance doesnt work

When i change to 2015 theme all seems ok

Have tried disabling plugins. Didnt help.

Since I am unable to contact the theme author I kindly request you guys at WPMUDEV to assist as to what is causing this issue.

My client is really stresssed out.