Problems were detected with this header / 301 redirects to 403


Redirection plugin is giving me a 403 status when I redirect a recently removed url to my home page. Error message: “Problems were detected with this header
Duplicate header. There is another header with this name and this may cause problems.” Any idea what this warning means?

Redirects that I send to a url with a related path gives me a 200. Am I missing something? The redirect works on Google, but not within Redirection:

Thank you

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


This site will teach you how to build a WordPress website for beginners. We will cover everything from installing WordPress to adding pages, posts, and images to your site. You will learn how to customize your site with themes and plugins, as well as how to market your site online.

Buy WordPress Transfer