Cockpit VirtMachine Error - ERROR Requested operation is not valid: network 'default' is not active Domain installation does not appear to have been successful.

 So I have a problem about kvm when I create it through cockpit on openmediavault, I just solved this issue by doing the following:

to check that is active or inactive
      virsh net-list --all

an example out shows like this:

 Name      State      Autostart   Persistent

----------------------------------------------

 default   inactive   no          yes

Then set it to automatically starts up when system is booted
            virsh net-autostart default

Start the module
    virsh net-start default