All Views displays blank screen

Hi, I am unable to add/view any views I created. When I click add a new view and set my desired options, the preview works fine, but when I click on save, I get a blank screen. Even clicking on all views gives me a blank screen. I use Musica theme of Kopathemes.com

Kindly help..

https://wordpress.org/plugins/content-views-query-and-display-post-page/