It has been reported that archive.is blocks cloudflare DNS due to cloudflare not supporting EDNS.
While a quick fix might be to change the DNS, another way to fix it while keeping the DNS is to change the hosts file.
⚠️Please do this only If you know what you are doing! This IP can change at any moment.
⚠️This method will not works DNS over HTTPS.
Edit the hosts file and add the following entries and you will be able to access archive.is even while using cloudflare DNS.
2001:41d0:1:8720::1 archive.is 126.96.36.199 archive.is