It sounds like you checked everything. If it’s still returning that error, open a support ticket:
To contact Cloudflare Customer Support, login & go to https://dash.cloudflare.com/?account=support and select get more help. If you receive an automatic response that does not help you, please reply and indicate you need more help.
Hi @jawad1, sorry for the issues. You may want to give it another try, I was able to add it without seeing the message. We have seen issues here from time-to-time with .pk domains. But, I am unable to guess at a root cause as the issues seem to go away on their own and there are a lot of .pk domains using cloudflare.
Support for certain can assist, but good to check while waiting. If you try again and receive the same message, wait a bit of time before re-trying. Multiple attempts to add a zone in a short period of time results in a temporary ban that will clear on it’s own after a few hours.