401 errors to Member Sites pages

I have a client who has a Member Sites area but has part of the content in front of the paywall in a blog. That blog has lots of links to the paywalled pages and SEM Rush is telling us that they are resulting in 401 errors. I'm wondering if trying to add a script to add nofollow links would help fix this issue? Any other suggestions? The client cannot change those links due to the size of the blog currently and the way they want the links to work.

Thanks!

@Collaborada this was what I was thinking and told them as well but I wanted to see what others thought about it. The SEO person is more in the content side of things and doesn't know much about the technical side and SEM Rush report looked kind of scary to them I think.

Thanks!