GSA has an error with url, which has the special symbol "@"

Hello, @Seven, I add my url to the project (here is my url: https://flipboard.com/@dakhoaquoctehn). Then the GSA alert error. You can see the error here.

I tried to try the entrance URL https://flipboard.com/ and GSA is fine. So, I think my problem is the "@" symbol in url. If it's true, I have a problem with the blog because many backlinks in my project are like that.

Can you check, and answer me how to fix it? Tks