Unclassified task cannot contain objects

What causes this issue?

Task &V1& is not classified and does not contain any objects.
The SAP System automatically assigns the task a type when you first
include an object in it. The task type depends on the type of objects.

System Response

You cannot edit the object list until the task has been classified.

How to fix this error?

Use the function <LS>Request/Type -> Change Type</> to assign a type to
the task.

Error message extract from SAP system. Copyright SAP SE.