NSURLErrorDomain error - 1012

Hi all,

I have joined Apple Device Enrollment Program and would like to enroll the iphone but unsuccessful.

When I ran Get Started with iPhone and until the step - Apps & Data, I tried to Setup as New iPhone but the error with NSURLErrorDomain error - 1012 was prompted. When I tried to Setup with Restore from iCloud Backup, I can success to enroll the iphone. May I know how to fix it? As I would want to set it as new iPhone instead of Restore from iCloud.