Extra Slash is Getting Added

I installed the plugin and it works fine, but it’s adding an extra forward slash right after the name of the site. Below is an example of the redirect:

/blog/* -> https://www.somesite.com/*

I’ve enabled wildcards, and it does properly redirect everything from blog to the root directory. But the result looks like this:

https://www.somesite.com//a-page-redirected

Any ideas why this might be happening?