KeyError: "The name 'deepspeech/input_node:0' refers to a Tensor which does not exist. The operation, 'deepspeech/input_node', does not exist in the graph."

[sambaPython24]

When trying to run the example, I get the error.

Traceback (most recent call last):
  File "path_to_voca_env/voca_env/lib/python3.8/site-packages/tensorflow/python/framework/ops.py", line 3618, in _as_graph_element_locked
    op = self._get_operation_by_name(op_name)
KeyError: ''

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "run_voca.py", line 59, in <module>
    inference(tf_model_fname, ds_fname, audio_fname, template_fname, condition_idx, out_path, str2bool(args.visualize), uv_template_fname=uv_template_fname, texture_img_fname=texture_img_fname)
  File "path_to_voca/voca/voca/utils/inference.py", line 109, in inference
    processed_audio = process_audio(ds_fname, audio, sample_rate)
  File "path_to_voca/voca/voca/utils/inference.py", line 43, in process_audio
    return audio_handler.process(tmp_audio)['subj']['seq']['audio']
  File "path_to_voca/voca/voca/utils/audio_handler.py", line 53, in process
    return self.convert_to_deepspeech(audio)
  File "path_to_voca/voca/voca/utils/audio_handler.py", line 102, in convert_to_deepspeech
    input_tensor = graph.get_tensor_by_name('deepspeech/input_node:0')
  File "path_to_voca/voca_env/lib/python3.8/site-packages/tensorflow/python/framework/ops.py", line 3723, in get_tensor_by_name
    return self.as_graph_element(name, allow_tensor=True, allow_operation=False)
  File "path_to_voca_env/voca_env/lib/python3.8/site-packages/tensorflow/python/framework/ops.py", line 3580, in as_graph_element
    return self._as_graph_element_locked(obj, allow_tensor, allow_operation)
  File "path_to_voca_env/voca_env/lib/python3.8/site-packages/tensorflow/python/framework/ops.py", line 3620, in _as_graph_element_locked
    raise KeyError(
KeyError: "The name 'deepspeech/input_node:0' refers to a Tensor which does not exist. The operation, 'deepspeech/input_node', does not exist in the graph."