Go to http://host:port/system/console/configMgr.
After upgrading to AEM 6.3, the Lock Payload Process [1] and Unlock Payload Process [2] workflow steps no longer work.
[1] com.day.cq.workflow.impl.process.LockProcess
[2] com.day.cq.workflow.impl.process.UnlockProcess
AEM 6.3
To apply configurations to allow the Lock/ Unlock processes to function in AEM 6.3, follow these steps:
Go to http://host:port/system/console/configMgr.
Find Day CQ Workflow Service.
Mark Enable Lock/Unlock Process to true.
Click Save.
Find Adobe Granite Repository Service User Configuration, and add a new configuration.
Set Simple Subject Population to true.
Set Service Users to workflow-process-service.
Click Save.
Sign in to your account