I'm getting a 'SNTP receive blocked' error under time server status, why?

The SNTP receive blocked error could be caused by a firewall, or it could be the selected time server is inundated with requests and isn't responding properly. Try selecting a different time server from the list, if this does not help, verify your internet connection is up and/or check firewall setting for SNTP port. NTP runs on UDP port 123.