This is a result of attempting to access the Blade via and/Vuzix View prior to authorizing the machine.
Make sure ADB Debugging is turned on. Upon receiving the prompt to allow debugging via the connected device, click OK.
If a prompt to authorize did not pop-up unplug and replug the USB.
If that did not trigger the prompt, try multiple ports and multiple cables.
If the prompt still is not present, try restarting the Blade and restarting the machine.