EPMAT-1:Failed to add users. EPMCSS-00767: Failed to add users.

Summary:

I am getting an error, when I try to add users to IDCS using addUsers command.

I have created the .csv file with these headers - First Name,Last Name,Email,User Login.

PS: It worked when we tried this 2 weeks ago.

This is the error message:

EPMAT-1:Failed to add users. EPMCSS-00767: Failed to add users. Error executing query : "/admin/v1/Bulk". Root Cause : HTTP response status code : 401 - {"schemas":["…….:Error"],"detail":"You are not allowed to perform any actions on this page.","status":"401","…….:Error":{"messageId":"error.common.common.accessDenied"}}. Please verify IDCS Configuration.

FYI: I didn't give the entire message here, I have replaced that with ..… :