Well Known Acme Challenge Not Working

So in order to make a self signed certificate I’m using letsencryptonline and to verify I own the domain, I need to upload a file to a specific folder. However, when I upload it, it does not work =(. Plz help my dudes

InfinityFree has a bot protection system that keeps the Let’s Encrypt bots from accessing your site files, so therefore you cannot use Let’s Encrypt for your certificate. There are other options, though, like Comodo’s free SSL at ssl.comodo.com/free-ssl-certificate.php. That’s what I use for my site, and it works perfectly fine, except for it’s not trusted in Firefox because it cannot get the CA chain.