System error while reading document classes for business object &

What causes this issue?

A system error occurred while reading the document classes for business
object &V1&. The function is terminated.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

INCLUDE NA_SYSVERW OBJECT DOKU ID TX LANGUAGE EN

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.