ntpd unable to create socket on en1
As Tony said, en1 = AirPort on most Macs. To go a bit further NTP(d) is related to your computers time. Have you noticed any issues with time being out of sync or the clock losing track of itself after a restart or start up after being shut down or removed from power?

Have there been any changes to your network recently (a new router or new settings in System Preferences > Network? 

There are a few things that could be going on with your system and ntpd is having issues reaching out and might be trying to promote your computer to a layer0 NTP server. Not what it should be doing. Normally the mac in front of our noses is down a few layers so see if you notice any time issues. If the issue remains delete the ntp.conf and reinstall your OS. If issue remains after reinstall then your RTC which is part of the logic board is bad and needs to be replaced.

Best of luck!