title: AssertionError: HybridBlock requires the first argument to forward be either Symbol or NDArray, but got <class 'numpy.ndarray'>
body: <p>I'm trying to run a pre-made program on my image, and the image type is a numpy array. When I hit enter, I get this error:</p>
  
  <pre><code>AssertionError: HybridBlock requires the first argument to forward be
                  either Symbol or NDArray, but got &lt; class 'numpy.ndarray' &gt;
  </code></pre>
  
  <p>Anyone know how to decipher this? When I look online, it says a <code>NDArray</code> IS a <code>numpy.ndarray</code>, so I'm not sure why it's complaining. Thank you very much!</p>