How to ad custom domain

[dan3008]

Rather than using chat gpt,I recommend reading the official guide

How to add your own domain to your account

While a free subdomain is a great way to get started, a website looks a lot more professional with a custom domain name. Fortunately, you can register your own domain name with an external company (like Spaceship) and use it on InfinityFree. Adding your domain name to your hosting account To add your domain name to your hosting account, you first need to have a hosting account. Even if you only want to host your own domain with us, you’ll first need to create a hosting account with a subdomain,…

But to answer your question, the nameserver change takes time to propergate.

Leave it a couple of hours and try again