No Response from (Mikrotik) NTP Server

Hi,

after an update i’m unable to sync time with the router.

The update was from ROS 6.39.1 to 6.42.3 on an CCR1016-12S-1S+
Prior to that i updated an CCR1016-12G without problems.

Different outputs from clients:
Mac - “sntp -d ”:
“no UCST response after 5 seconds”

Windows - “w32tm /stripchart /computer:”" /dataonly /samples:5":
Error: 0x800705B4

Ubuntu - ntpdate -q
server , stratum 0, offset 0.000000, delay 0.00000
13 Jun 12:47:55 ntpdate[78]: no server suitable for synchronization found

Any ideas?