Based on your comment, I checked and found that there's new windows cumulative update available. I installed it and will check. In the meantime, I still see the same link in the DeviceMetadataServiceURL (and it's also not working):
https://go.microsoft.com/fwlink/?LinkID=2257403&clcid=0x409
(It points to https://devicemetadataservice.trafficmanager.net/dms/metadata.svc)