avahi-daemon fail to start

[bso-intel]

I have snapd 2.22. I installed the classic snap on Ubuntu Core 16.04 on the Joule board. I need avahi-daemon service, so I ran "sudo apt install avahi-daemon" under the classic prompt. It seems failed to install avahi-daemon successfully. I saw this log message at the end of avahi-daemon installation.

Setting up avahi-daemon (0.6.32~rc+dfsg-1ubuntu2) ... invoke-rc.d: policy-rc.d denied execution of force-reload. invoke-rc.d: policy-rc.d denied execution of start.

I tried to run the daemon manually with "sudo service avahi-daemon start", but it shows the error.

Unit avahi-daemon.service not found.

Note that I was able to install avahi-daemon successfully on Ubuntu Desktop 16.04. Any advice would be greatly appreciated.