To explain how an Invalid License error can occur if the NIC was not set to start on boot.
If you rebooted the DPU and once the unit restarted, it displays an alert that the license was invalid. The NIC may not have been set to start upon reboot. To resolve this problem, go to Configure -> Network -> ETH0 and make sure the “On Boot” field is checked. When the DPU boots the NIC must be available to validate the license.