Tor is not running after installation in KVM

Tor is not working in the gateway after installation in KVM (Linux Mint, Cinnamon Desktop).

When I systemcheck:

[ERROR] [systemcheck] check network interfaces Result: network interface eth1 not up!

Debugging information
Command sudo --non-interactive cat /sys/class/net/eth1/carrier failed

How to solve it?

If you are running kvm whonix gateway cli you need to run this first

sudo setup-dist

It is still not working. After the command following message:

INFO: Starting systemcheck…
[ERROR] [systemcheck] check network interfaces Result: network interface eth1 not up!

If you know what you are doing, feel free to disable this check.
Create a file /etc/systemcheck.d/50_user.conf and add:
systemcheck_skip_functions+=" check_network_interfaces "

Debugging information:
Command sudo --non-interactive cat /sys/class/net/eth1/carrier failed.
INFO: End of systemcheck. You can always start systemcheck again with:
systemcheck
You can always enter setup-dist again, by starting: sudo setup-dist

I went also through the troubleshooting in the wiki…

A new installation solved that problem…