Could you try the following so we can isolate the issue?
- Go to ’ Settings ’ and select ‘Network’
- Select 'Advanced Settings ’
- Select 'DNS Settings ’
- Select ‘Manual’
- Enter as Primary DNS server address 8.8.8.8
- Select Enter to input this Secondary DNS server address: 8.8.4.4
- Press ‘B’ on your Xbox controller to save your DNS changes.
- Restart your Xbox One.