Custom permalinks 404 Error

We are using “Custom Permalinks” option with WP. Your plugin does not work with custom permalinks and returns a 404 error on a post page when they are used. The solution is apparently simple, and we found it on the WP forums. Adding print=1 to the URL fixes it.

Here is the URL that will show you a 404 if you click the print link on it: http://stage2.hairlosstalk.com/news/uncategorized/sample-post-page/ (popup password is pizza / pizza)

The custom permalink we’re currently using is:
“/news/%category%/%postname%/”

https://ww.wp.xz.cn/plugins/wp-print-friendly/