Transaction code should not be SM30/SM34 for activity &

What causes this issue?

Transaction code should not be maintained as SM30 or SM34 in WEBGUI
Registry (/cfg/webgui_details)

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?

Maintain valid transaction for the SSCUI in WEBGUI Registry

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.