Check function '&' is inactive

What causes this issue?

Header data
A check function has been configured in Customizing for specifications
of the specification type specified. This function checks the syntax of
the specification key.
This function is not contained in your system or it is inactive.
Identifiers
A check function has been configured in Customizing for the
identification type you entered. This function checks the syntax of the
identifier.
This function is not contained in your system or it is inactive.

System Response

The system is unable to run a syntax check.

How to fix this error?

Notify your system administrator of the missing check function &V1&.

Error message extract from SAP system. Copyright SAP SE.