You have not entered settings for BSKEY &1

What causes this issue?

You have not entered any settings for the business key BSKEY &1.

System Response

If you do not enter any settings for the control of the RFC queue, then
no confirmation can be sent to the sending system.

How to fix this error?

Enter the settings for <DS:SIMG./SCWM/TWMEQUEUE>Control for RFC Queue</>
and then restart processing.

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.