Cannot find default assessment

What causes this issue?

When you create a value assignment, the system automatically assigns it
a default assessment.
Currently, no assessment is defined as the default assessment.

System Response

The system cannot assign a default assessment to new value assignments
automatically.

How to fix this error?

Check the settings in Customizing (value assignment assessments; table
TCG71) or notify your system administrator.

Error message extract from SAP system. Copyright SAP SE.