Forbidden You don’t have permission to access /login/ on this server.

I’m testing this pluging on a local version of WordPress, and after I activate it, certain login redict links that are native to my site’s theme are resulting in the error that’s the subject of this post.

As an example, this link no longer works:
http://localhost/login/?redirect_to=http%3A%2F%2Flocalhost%2Flistings%2Ftest2%2F

But when not using a URL parameter, it does work:
http://localhost/login/

Please advise.

Thank you!