Freenom free domains cannot be used in the free or paid hosting service.
Why can’t I use them?
We understand that you’d like to try a custom domain with your name to begin with, but testing doesn’t require that.
The reason these domains are not allowed is that they are used for spam. that is the main reason why these domains are not accepted in our hosting.
I don’t have a domain, what can I do?
It has no domain, don’t worry. you can use a subdomain of .projct.dev
This will help you to test and create incredible web design