The documentation portal is undergoing maintenance. During this period, you can't create any new user credentials. If you do, you'll need to recreate the user credential after the maintenance period ends.
You can upgrade Supplier 360 in console or silent mode. Use the silent mode if you do not want any user interaction during upgrade.
When you upgrade from a version earlier than 10.4 , if you use MDM - Customer 360 in the same environment, ensure that you upgrade Customer 360 before upgrading Supplier 360.