I completed the documentation again and followed the example. I have fixed my mistake. hopefully this helps others! I needed to continue the URL up until the ‘Shared Documents’ Folder.
Exception Scenario
Scope: https://sharepoint.xxx.com/corp/
Item URL: /corp/Ariba/Shared Documents/Ariba User List/test.xlsx
Solution:
Scope: https://sharepoint.xxx.com/corp/Ariba
Item URL: /Shared Documents/Ariba User List/test.xlsx