After signing into adobe.com correctly, you attempt to navigate to one of the available sections like Files or Add Ons, however you receive a spinning icon that never loads.
The issue is caused by an OPTIONS request for Adobe that is triggering authentication, which in turn does not complete, and the page does not load:
To resolve the issue:
Create a Do Not Authenticate object for adobecc.com
More information on Do Not Authenticate policies can be found here: Bypassing authentication on the ProxySG based on the destination URL