[Plugin: Top Authors] Top Author Links to a Not Found Page

Hi all, I’m running the latest version of WP 3.1.2 and i recently installed “Top Authors” on my site.
However, i noticed this problem that when i click on the author link, it takes to a wrong page.
For example, say author name is Samuel,and i click on it on the sidebar, i get taken to this link below
https://webarticless.com/authors/Samuel/ and it should be this
https://webarticless.com/author/Samuel/
..without the “s” in authors.
Please how do i rectify this please?
Thanks

https://www.ads-software.com/extend/plugins/top-authors/