If you get the error message "<b>Error starting domain: Requested operation is not valid: network 'default' is not active</b>", then try to start the default virtual network:
<ol> <li>Click on <b>QEMU/KVM - Not Connected</b>.</li> <li>Choose <b>Edit ▸ Connection details</b> to administer the connection to your local <i>QEMU</i> system.</li> <li>Click on <b>Virtual Networks</b> tab, then select the <b>default</b> virtual network in the left pane.</li> <li>Click on the [[!img lib/media-playback-start.png alt="Start Network" link=no class=symbolic]] icon on the bottom of the left pane to start the default virtual network.</li> </ol>
