Help Not working

I have a few pages (post_type=page) and lots of products (post_type=product).
I see you only use post_type=page.

When i go to a page (not product) like http://www.aanbiedingmonitor.nl/prijsvergelijkers/autoverzekering-vergelijken/
and change one letter it always goes to http://www.aanbiedingmonitor.nl/

Your code does see the 404 because if i rewrite your redirect to http://www.example.com. It goes to that page.

Can’t find a error in your code!

https://ww.wp.xz.cn/plugins/wp-redirect-to-similar-page/