I'm getting an error while adding ORDS security in Connectors within PCS

Summary:

I'm getting an error while adding ORDS security in Connectors within PCS.I'm trying to add my ORDS into PCS using Connectors, and while setting up the security for ORDS, I selected OAuth Client Credentials as the security method. However, when I test the connection, I'm receiving the following error with status code 422:

{"errorCode": "PR_CS-0028","status": 422,"message": null,"details": "Access Token request failed","cause": null,"opcRequestId": "/16F40AE057A32D2FA5A52E2923E97B34/EB996BCF467F8478031ABC4BEA58E79A"}i have added image for refernce also.

I'm not sure where to check for this issue or how to resolve it. If you have any idea, please let me know.