Nameserver not works

[Oxy]

unless this is the case

Unable to set nameservers: DNS query refused

Before you can add a domain name to your account, you need to point it to the InfinityFree nameservers first. However, some domain providers show an error like this when trying to change the nameservers: DNS Query Refused If that happens, your registrar will tell you that the nameservers must be configured first. What causes this issue Before you can add your domain to your InfinityFree account, you need to verify you can control the domain. The usual way to do so right now is by setting th…

then

If DNSSEC is active, the name servers can not be changed without breaking the DNS zone

Disable DNSSEC at your DNS provider
Wait 24 hours
Switch name servers.+
Wait 24 hours
? *(1)Re-enable DNSSEC

I also see that you are using Cloudflare NS
so check there dnssec as well
*(1)basically you should do this when you add the domain here to the system and then return it to Cloudflare and then enable dnssec