Synchronization Editor prompts for Client Secret and Grant type in Target System (Starling connect)

Hi Experts,

We tried to configure a Starling Connector with ServiceNow. The configuration in Starling Connect and Identity Manager is done. When we tried to hit the "Target System: in the Synchronization Editor again, it prompts for client secret (Base64) and Grant type. It said "Cross-Domain Identity Management (ServiceNow - Connect) still contains encrypted values. These could not be decrypted when the synchronization project was loaded" We tried every combination but none is working. Could anyone shed some lights to us on what I should fill in? Thank you.

Ronald