Error

Traceback (most recent call last):
  File "/scratch/amq259/nlu/experiment-script.py", line 354, in <module>
    tot = loader(dataset_name, tokenizer, args.cache_dir)
  File "/scratch/amq259/nlu/experiment-script.py", line 150, in loader
    tot.append(_preprocess_dataset(dataset_name, data, sentence_col, tokenizer))
  File "/scratch/amq259/nlu/experiment-script.py", line 157, in _preprocess_dataset
    data = data.map(
  File "/scratch/amq259/envName/lib/python3.9/site-packages/datasets/dataset_dict.py", line 432, in map
    {
  File "/scratch/amq259/envName/lib/python3.9/site-packages/datasets/dataset_dict.py", line 433, in <dictcomp>
    k: dataset.map(
  File "/scratch/amq259/envName/lib/python3.9/site-packages/datasets/arrow_dataset.py", line 1407, in map
    update_data = does_function_return_dict(test_inputs, test_indices)
  File "/scratch/amq259/envName/lib/python3.9/site-packages/datasets/arrow_dataset.py", line 1378, in does_function_return_dict
    function(*fn_args, indices, **fn_kwargs) if with_indices else function(*fn_args, **fn_kwargs)
  File "/scratch/amq259/nlu/experiment-script.py", line 158, in <lambda>
    lambda x: tokenizer(x["input_text"], padding="max_length", truncation=True),
  File "/scratch/amq259/envName/lib/python3.9/site-packages/transformers/tokenization_utils_base.py", line 2210, in __call__
    assert isinstance(text, str) or (
AssertionError: text input must of type `str` (single example), `List[str]` (batch or single pretokenized example) or `List[List[str]]` (batch of pretokenized examples).