Please note line 3 in that file which says DO NOT EDIT THIS FILE. I’m also not sure why you’re looking in .htaccess files to begin with, because nobody told you to, and I don’t think it’s a .htaccess problem.
When I said “check the domains list”, I mean:
- Login to the client area at https://dash.infinityfree.com
- Click your hosting account in the list.
- Go to the Domains menu on that page.
- Find your domain name in the list, and check the Directory field next to it.
That’s where the files for your domain name should be uploaded.
If you’re not sure if you uploaded the files to the right location, you can click the File Manager link to your domain name. Does it immediately show you your website files? Then they’re uploaded to the right location. Do you see an empty directory? Then your website files are in the wrong location.