Error creating new kvm system

In my experience, the error message

is due to the network configuration being incorrect and I would typically correct this using a VNC client.

What is under 'System Configuration → ‘Network Interfaces’ ?

this is what i have in network interfaces

You should have something like this, if the network config is set up correctly:

The only way I know of correcting this, is manually by accessing the KVM via VNC.

How did you assign the IP address for the guest? Automatically from the IP pool?

Maybe post up your KVM Host settings too.

For op original, perhaps it’s the way you are taking backups…