Cloudflare Error 1000 when accessing a host-mapped domain

Issue symptoms

I configured host mapping for my Zendesk Support subdomain and I am encountering a Error 1000 message.

The Cloudflare Error 1000 may occur for multiple reasons:

Your domain may be banned from Cloudfare
There may be a zone hold on your host mapped domain, leading to issues with routing and accessibility

For more information on how to release Zone holds, see this article from Cloudflare: Release Zone Holds.

If your host mapped domain does not have a Zone hold, or you have questions, contact Zendesk Customer Support.