No hierarchy headers exist. Create at least one header

What causes this issue?

No hierarchy header exists.

System Response

Cannot load a hierarchy without a hierarchy header.

How to fix this error?

Create at least one hierarchy header on the "Extraction" tab page and
select the required header on the "Hierarchy" tab page.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.