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What is the domain name?
dotnetcoretutorials dot com
Have you searched for an answer?
Describe the issue you are having:
I just bought this site, and am having trouble adding it to my Cloudflare account. When I try to do so, I get an “invalid domain” error, though the site certainly exists at that domain. It is currently on the prior owner’s Cloudflare account, but he told me that I should be able to transfer it to my own account without difficulties.
What error message or number are you receiving?