how to allow readers to attach image with their review on my listing place?

I am using Supreme Directory Theme to build my site, and I want to allow a reader to attach images to their reviews on the places.
I had tried plugins “comment image” and “comment images reloaded”.

There is the same page to be displayed when I try to write a review attached with an image:
Not Found
This is somewhat embarrassing, isn’t it?
It looks like nothing was found at this location. Maybe try a search?

How can I fix it? Or can I allow readers to attach image through other ways?
Thank You very much for any help!!

site: top5toeat.com