Conversion of Internet Services finished

What causes this issue?

There are objects that exist in the old format.

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?

If no errors have occurred, then no activities are required before going
productive.
Use transaction SIAC1 to get an overview of the objects that exist in
the old format.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.