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Test Before You Post
Unsure of the issue? Test before posting using the Cloudflare Diagnostic Center: Diagnostic Center | Check SSL and Test Website Security | Cloudflare
The requested hostname resolves to a Cloudflare zone that is not owned by you. HTTP domain control validation (DCV) cannot be completed. Update this hostname to resolve to your zone and PATCH to try again.
And the domain belong to me, and the url can be open to check the txt file, but it keep fail to get the ssl.