The 'World Publishing is Currently Unavailable. Please Try Again Later.' error occurs when attempting to re-publish a specific existing world in the Desktop Editor app (version 261.0.0.5.299 on Windows 10 64-bit). This issue is isolated to the original world instance, as publishing other worlds and duplicates of the same world succeeds. The error suggests a potential corruption or state issue with the particular world's publishing metadata, and it prevents updates to a world that has accumulated engagement metrics.