You can use human in the loop in Oracle Integration only if you have enabled Process Automation.

To use human in the loop in Oracle Integration:

• Enable Process Automation for your Oracle Integration instance.
• Assign the predefined Process Automation roles ServiceDeveloper or ServiceAdministrator to the required users or groups so that they can access the human in the loop feature on your instance.

For detailed instructions to enable Process Automation, see Enable Process Automation with Oracle Integration 3 in Administering Oracle Cloud Infrastructure Process Automation.