I'm trying to install an SSL certificate on my shared hosting by Plesk. It worked before, but the renewal went wrong. I finally uninstalled the certificate, but when I try to get a new one, I can't access the .well-known/acme-challenge folder.
I tried to put a test file inside but ends up with a 404 error. If I place the file inside .well-known, I can access it. If I rename the acme-challenge folder to acme2-challenge, I can access it.
What makes this specific acme-challenge file so protected, and where can I unprotect it?