Not working on dokan

Hi guys,
I got your plugin with the theme i bought and i’m using Dokan Multivendor.
Vendors can not add any color, image or label variations from they’re dashboard, it displays nothing. I’ve tried to change variations to name, custom order, ID and nothing works. The problem is when i choose either image, label or color!!

I tried the free version and i had the same problem!

Please advice!!
Thanks!!

The page I need help with: [log in to see the link]