Failure in alpha_zero.py

[tacertain]

I finally got TF working and tried to run the alpha zero examples. Running both alpha_zero.py on Quoridor and running the tic_tac_toe_alpha_zero.py yielded the same failure. Is this something known? Is it possibly a library mismatch (I have to say that the version management for Cuda/CudNN/TF/etc is pretty confusing for a newbie, so I'm sure I could have messed something up.)

I will continue to poke around and see if I can figure it out.

  File "/home/certain/src/open_spiel/test/../open_spiel/python/examples/tic_tac_toe_alpha_zero.py", line 68, in <module>
    app.run(main)
  File "/home/certain/src/open_spiel/venv/lib/python3.10/site-packages/absl/app.py", line 308, in run
    _run_main(main, args)
  File "/home/certain/src/open_spiel/venv/lib/python3.10/site-packages/absl/app.py", line 254, in _run_main
    sys.exit(main(argv))
  File "/home/certain/src/open_spiel/test/../open_spiel/python/examples/tic_tac_toe_alpha_zero.py", line 63, in main
    alpha_zero.alpha_zero(config)
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/alpha_zero.py", line 545, in alpha_zero
    learner(game=game, config=config, actors=actors,  # pylint: disable=missing-kwoa
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/alpha_zero.py", line 171, in _watcher
    return fn(config=config, logger=logger, **kwargs)
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/alpha_zero.py", line 331, in learner
    model = _init_model_from_config(config)
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/alpha_zero.py", line 148, in _init_model_from_config
    return model_lib.Model.build_model(
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/model.py", line 173, in build_model
    cls._define_graph(model_type, input_shape, output_size, nn_width,
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/model.py", line 241, in _define_graph
    torso = cascade(observations, [
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/model.py", line 28, in cascade
    x = fn(x)
  File "/home/certain/src/open_spiel/open_spiel/python/algorithms/alpha_zero/model.py", line 50, in batch_norm_layer
    applied = bn(x, training)
  File "/home/certain/src/open_spiel/venv/lib/python3.10/site-packages/keras/src/utils/traceback_utils.py", line 122, in error_handler
    raise e.with_traceback(filtered_tb) from None
  File "/home/certain/src/open_spiel/venv/lib/python3.10/site-packages/tensorflow/python/framework/tensor_shape.py", line 1440, in as_list
    raise ValueError("as_list() is not defined on an unknown TensorShape.")
ValueError: as_list() is not defined on an unknown TensorShape.

[tacertain]

Look like this is a dup of #1206