Failed to lookup registrar and hosting information of [domain] at this time

Hello! I’m trying to add a new domain to Cloudflare and I get this error.
I’ve all correct, also I’ve checked the page that has Cloudflare to look the dns of the page, … and it finds it correctly.
Any idea, fix?

That domain is registered under a TLD which is governed by the Freenom registry. Freenom currently experiences issues with their Whois service which prevents such domains from being added to Cloudflare. Freenom needs to fix that on their side. Unfortunately there is no ETA known for that.

It probably is best to register a proper domain instead. They already go for less than $10 a year.