The links are not incorrect except Link 1. Did you copy Link 1 correctly?
After you upload a static file, your web server should serve its content. It’s the default behavior of any WordPress website.
But when I clicked ‘Link 2‘, I got a ‘404 Not Found’ error. Here is the screenshot. Your web server must have a misconfiguration; our plugin has no control over it.
If you can’t fix this issue even with the help of your web hosting provider, please try the DNS-01 challenge instead. You must create two DNS TXT records with your domain registrar (or DNS provider). Please search for your domain registrar’s documentation on how to set DNS TXT records. Once you set the DNS TXT records, please wait at least 15 minutes before you proceed.
I am marking this topic resolved. However, if you need any more help, please feel free to reply here.