Self Client Authorization Issue

Self Client Authorization Issue

Hi. Trying to test the api integration for Zoho Desk with the Self Client - Client Credintials flow method. 

I've created the self client, obtained the client id and secret, inputted "Desk.tickets.ALL" as my scope, and "ZohoDesk.[My Zoho Desk Org ID]" for the SOID parameter, but keep getting the error  "missing_org_info".