Error message in VM Unraid 6.9.0-rc1

Upgraded from 6.8.3 to RC1 and have now the following problem:

After the VM is started and the VNC Remote button is pressed this window appears.

Changed the virtio-net like mentioned in the @SpaceInvaderOne Video.

</controller>
    <interface type='bridge'>
      <mac address='52:54:00:32:c1:25'/>
      <source bridge='br0'/>
      <model type='virtio-net'/>  hier stand vorher: 'virtio'
      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>