In /var/log/ntp the following errors occur:

9 Feb 09:34:01 ntpd[4561]: ntpd exiting on signal 15
9 Feb 09:34:04 ntpd[10557]: Deleting interface #2 lo, ::1#123, interface stats: received=0, sent=0, dropped=0, active_time=1 secs
9 Feb 09:34:04 ntpd[10557]: Deleting interface #3 eth1, fe80::21c:c4ff:fea6:d040#123, interface stats: received=0, sent=0, dropped=0, active_time=1 secs
9 Feb 09:34:04 ntpd[10557]: Deleting interface #4 eth0, fe80::21a:4bff:fede:4d64#123, interface stats: received=0, sent=0, dropped=0, active_time=1 secs
9 Feb 09:37:17 ntpd[10557]: synchronized to 83.98.201.133, stratum 2
9 Feb 09:37:17 ntpd[10557]: kernel time sync error 0001
9 Feb 09:49:09 ntpd[10557]: synchronized to 94.75.218.117, stratum 2
9 Feb 10:05:10 ntpd[10557]: synchronized to 83.98.201.133, stratum 2
9 Feb 10:34:03 ntpd[10557]: can't open /var/lib/ntp/drift/ntp.drift.TEMP: Permission denied

I tried the "permission denied" solution (Accurate Time with NTP - RimuHosting) but still getting the errors. Didn't find information about the kernel time sync error.

Can somebody help me solve the kernel time sync error and permission denied problem?