Data flow contains an inactive object: &1 &2

What causes this issue?

The object &V2& of type &V1& with the node ID &V3& is inactive.

System Response

The data flow contains fields and cannot be activated.

How to fix this error?

Activate the object or remove it from the data flow.

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.