[UDP] Errors do not appear in console or editor log

When using the UDP package to configure a project and it's IAP products, errors are often shown to the user in regards to validation/pushing/pulling. Currently these errors are shown to the user embedded in the inspector and are not pushed to the console or editor log, inconsistent with other error handling throughout Unity.

Steps to reproduce:
- In Unity 2019.3, create a new project and install the Universal Distribution Portal (UDP) package (alternatively download the attached project)
- Menu: Window > Universal Distribution Portal > Settings
-Inspector (UDP Settings) > Register the project with Unity Cloud Services if the UDP Settings Inspector pane indicates it is not already
- In the Network Adapter settings in the host Operating System, disable all network adapters
- Inspector (UDP Settings) > Pull
- Observe an error is reported to the user
- Observe the same error is not reported to the console