rasa-nlu-examples: Tensorflow error while running benchmarking guide

Hi @koaning

I follow benchmarking guideline here https://rasahq.github.io/rasa-nlu-examples/benchmarking/

but found this error

(binus) Wellys-MacBook-Pro:rasa-demo wellytambunan$ rasa test nlu --config basic-bytepair.config.yml           --cross-validation --runs 1 --folds 2           --out gridresults/basic-bytepair-config
2020-08-14 10:22:31 INFO     rasa.cli.test  - Test model using cross validation.
Traceback (most recent call last):
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/bin/rasa", line 8, in <module>
    sys.exit(main())
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/__main__.py", line 92, in main
    cmdline_arguments.func(cmdline_arguments)
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/cli/test.py", line 147, in run_nlu_test
    perform_nlu_cross_validation(config, nlu_data, output, vars(args))
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/test.py", line 243, in perform_nlu_cross_validation
    data, folds, nlu_config, output, **kwargs
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/nlu/test.py", line 1354, in cross_validate
    trainer = Trainer(nlu_config)
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/nlu/model.py", line 142, in __init__
    components.validate_requirements(cfg.component_names)
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/nlu/components.py", line 46, in validate_requirements
    from rasa.nlu import registry
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/nlu/registry.py", line 13, in <module>
    from rasa.nlu.classifiers.diet_classifier import DIETClassifier
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/rasa/nlu/classifiers/diet_classifier.py", line 9, in <module>
    import tensorflow_addons as tfa
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/__init__.py", line 21, in <module>
    from tensorflow_addons import activations
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/activations/__init__.py", line 21, in <module>
    from tensorflow_addons.activations.gelu import gelu
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/activations/gelu.py", line 24, in <module>
    get_path_to_datafile("custom_ops/activations/_activation_ops.so"))
  File "/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow/python/framework/load_library.py", line 58, in load_op_library
    lib_handle = py_tf.TF_LoadLibrary(library_filename)
**tensorflow.python.framework.errors_impl.NotFoundError:** dlopen(/Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/custom_ops/activations/_activation_ops.so, 6): **Symbol not found:** __ZN10tensorflow11GetNodeAttrERKNS_9AttrSliceEN4absl11string_viewEPb
  Referenced from: /Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/custom_ops/activations/_activation_ops.so
  Expected in: /Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow/python/../libtensorflow_framework.2.dylib
 in /Users/wellytambunan/opt/anaconda3/envs/binus/lib/python3.6/site-packages/tensorflow_addons/custom_ops/activations/_activation_ops.so
(binus) Wellys-MacBook-Pro:rasa-demo wellytambunan$