Problem adding a domain

Hello, do not be tired
When I wanted my domain with the extension:
.ga
Yes, I register this error is given:
Failed to lookup registrar and hosting information of tether.ga at this time. Please contact Cloudflare Support or try again later.
Please help.

That domain is probably 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.