It looks like "Here" is using new urls and also a new authentication method, I have found no informations about when they will remove the legacy url but fo new REST/JS Apps you can not even generate an app code anymore....

https://developer.here.com/documentation/geocoder/topics/dev_guide/request-constructing.html

https://developer.here.com/documentation/authentication/dev_guide/topics/api-key-credentials.html