AssertionError Lucid

512 nan
---------------------------------------------------------------------------
AssertionError                            Traceback (most recent call last)
<ipython-input-3-c3439b8b3db6> in <module>
      2
      3 obj = objectives.channel("mixed4a_pre_relu", 300) + objectives.channel("mixed4a_pre_relu", 400)
----> 4 _ = render.render_vis(model, obj)

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/optvis/render.py in render_vis(model, objective_f, param_f, optimizer, transforms, thresholds, print_objectives, verbose, relu_gradient_override, use_fixed_seed)
    108             print(i, loss_)
    109             print_objective_func(sess)
--> 110             show(np.hstack(vis))
    111     except KeyboardInterrupt:
    112       log.warning("Interrupted optimization at step {:d}.".format(i+1))

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/showing.py in show(thing, domain, **kwargs)
    164     elif rank in (2, 3):
    165       log.debug("Show is assuming rank 2 or 3 tensor to be an image.")
--> 166       image(thing, domain=domain, **kwargs)
    167     else:
    168       log.warning("Show only supports numpy arrays of rank 2-4. Using repr().")

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/showing.py in image(array, domain, w, format, **kwargs)
     79
     80   _display_html(
---> 81     _image_html(array, w=w, domain=domain, fmt=format)
     82   )
     83

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/showing.py in _image_html(array, w, domain, fmt)
     61
     62 def _image_html(array, w=None, domain=None, fmt='png'):
---> 63   url = _image_url(array, domain=domain, fmt=fmt)
     64   style = "image-rendering: pixelated;"
     65   if w is not None:

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/showing.py in _image_url(array, fmt, mode, quality, domain)
     53     raise ValueError(message, mode, supported_modes)
     54
---> 55   image_data = serialize_array(array, fmt=fmt, quality=quality, domain=domain)
     56   base64_byte_string = base64.b64encode(image_data).decode('ascii')
     57   return "data:image/" + fmt.upper() + ";base64," + base64_byte_string

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/serialize_array.py in serialize_array(array, domain, fmt, quality)
    116     image data as BytesIO buffer
    117   """
--> 118   normalized = _normalize_array(array, domain=domain)
    119   return _serialize_normalized_array(normalized, fmt=fmt, quality=quality)
    120

~/conda/envs/tf114/lib/python3.6/site-packages/lucid/misc/io/serialize_array.py in _normalize_array(array, domain)
     49   assert len(array.shape) <= 3
     50   assert np.issubdtype(array.dtype, np.number)
---> 51   assert not np.isnan(array).any()
     52
     53   low, high = np.min(array), np.max(array)

AssertionError: