Error in adding site

Failed to lookup registrar and hosting information of asmaapps.tk at this time. Please contact Cloudflare Support or try again later.

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.