Internal error occurred: LOOP for screen_leave

What causes this issue?

An internal error has occurred.

System Response

INCLUDE VERARBEITUNG-ENTER OBJECT DOKU ID TX LANGUAGE EN

How to fix this error?

You can continue with your work since the system has solved the problem
itself.
Nevertheless, report the error to SAP AG, and describe in detail the
preceeding dialog steps.

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.