one possibility is it could have an expired security certificate.
things to try:
block port 123 udp on your Router
reset the hub and onboard the hub to the app
unblock port 123 udp
if you don’t have the ability to block port 123 udp than block the domain ntp.org and follow the same steps above. Many hubs have a perental control option that allows you to block domains.
if your hub does not allow you to block ports or domains, you should find a friend or family member who has a network that allows it.