Side bar is not loading properly

I’m using the them Dynamic news (lite) and I have the following problem and i don’know how to fix it.

When I’m using this theme the sidebar is not loading on the right as normal but he is loading under the content, first I was thinking this was a theme problem but when I deactivate the WP Product review plugin he is loading fine. Could this be a problem of the plugin or do I have to contact the theme makers?

You can see the problem on my website: http://www.speelblog.nl

https://wordpress.org/plugins/wp-product-review/