Wrong link to author

Is there anyway to fix the links showing on my products page.

The links to lead to “Vendor page” goes wrong, it looks like this:
(but it’s wrong, it leads to 404 error page)
https://xxxxxx.com/downloads/itemstitle/vendername

Correct link should be like this:
https://xxxxxx.com/author/vendername/

But the problem is i don’t know what should i do to edit it. If you wanted to know which template i’m using, it’s Marketify. I’m also using Frontend Submissions. Marketify theme works nicely before i did something wrong to somewhere. I don’t know where it is, I’m a newbie and I don’t know how to fix this.

You may see error links on this page: https://locobay.com
Error links are showing on this image: https://i.imgur.com/bOApZuU.jpg

Your suggestions would be appreciated.