Apparently, the redirect to my subdomain is incorrect

[Greenreader9]

That would be a DNS issue on your end, so nothing is really wrong with InfinityFree’s servers.

Please see this article:

When will my domain name start working

If you’ve just created your account, or just added a new domain name to an account, you may be surprised that you are unable to view your website when using the domain. Instead you may see: An advertisements page, with ?z being added to the URL. An error saying “This site can’t be reached”. This is usually caused by a system called DNS Caching. This article explains how DNS Caching works, why your website isn’t up yet and what you can do to see your website right now. When will I be able to …