Yes, you will need an NTP server on your network and can then set the hub to use that server instead of a cloud NTP server. See:
It's often helpful to share what you've found. Closed posts are not necessarily bad; many of these were done as part of a cleanup a while back. The advice may still be correct, but if you already tried something and had a problem and what you tried was still a current method of doing so, there may be another problem.
