Settlement rule maintenance is not possible (see long text)

What causes this issue?

No <DS:GLOS.Settlement_profile>Settlement_profile</> was found for the
object you are currently processing (for example, order, cost object).
Additionally, you cannot enter a settlement profile, as the current
transaction does not allow you to change the settlement parameters.

System Response

It is not possible to maintain the settlement rule.

How to fix this error?

Maintain the settlement rule with the corresponding master data
transactions (for example, "Change order").
It is advisable to enter the settlement profile in Customizing. This
settlement profile is then automatically copied when you create a
settlement rule. For orders (apart from sales orders) you enter the
settlement profile in the order type.

Error message extract from SAP system. Copyright SAP SE.