An Error report about pipeline
# 🐛 Bug

## Information

This may be an easy question, but it has been bothering me all day.

When I run the code: 
nlp = pipeline("question-answering")

It always tells me: 
Couldn't reach server at 'https://s3.amazonaws.com/models.huggingface.co/bert/distilbert-base-cased-distilled-squad-modelcard.json' to download model card file.
Creating an empty model card.

If I ignore it and continue to run the rest of the code: 
nlp({
    'question': 'What is the name of the repository ?',
    'context': 'Pipeline have been included in the huggingface/transformers repository'
})

The error will appear:
KeyError: 'token_type_ids'
I have this same issue, but have no problems running:

nlp = pipeline("question-answering")


Note: To install the library, I had to install tokenizers version 0.6.0 separately, git clone the transformers repo and edit the setup.py file before installing as per @dafraile's answer for issue: https://github.com/huggingface/transformers/issues/2831

Update: This error was fixed when I installed tokenizers==0.5.2<|||||>I sadly have this issue too with the newest transformers 2.6.0 version.

Tokenizers is at version 0.5.2. But newest version of tokenizers sadly also doesn't work.

And solutions to fix this issue?<|||||>I have the same issue here. I first ran with my own tokenizer, but it failed, and then I tried to run the 03-pipelines.ipynb code with QnA example and I get the following error code.

Environment:
tensorflow==2.0.0
tensorflow-estimator==2.0.1
tensorflow-gpu==2.0.0
torch==1.4.0
transformers==2.5.1
tokenizers==0.6.0

Code that I ran:
nlp_qa = pipeline('question-answering')
nlp_qa(context='Hugging Face is a French company based in New-York.', question='Where is based Hugging Face ?')

Error code:

HBox(children=(FloatProgress(value=0.0, description='Downloading', max=230.0, style=ProgressStyle(description_…

convert squad examples to features:   0%|          | 0/1 [00:00<?, ?it/s]
---------------------------------------------------------------------------
RemoteTraceback                           Traceback (most recent call last)
RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/home/brandon/anaconda3/envs/transformers/lib/python3.7/multiprocessing/pool.py", line 121, in worker
    result = (True, func(*args, **kwds))
  File "/home/brandon/anaconda3/envs/transformers/lib/python3.7/multiprocessing/pool.py", line 44, in mapstar
    return list(map(*args))
  File "/home/brandon/anaconda3/envs/transformers/lib/python3.7/site-packages/transformers/data/processors/squad.py", line 198, in squad_convert_example_to_features
    p_mask = np.array(span["token_type_ids"])
KeyError: 'token_type_ids'
"""

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

KeyError                                  Traceback (most recent call last)
<ipython-input-6-95614263b54d> in <module>()
      1 nlp_qa = pipeline('question-answering')
----> 2 nlp_qa(context='Hugging Face is a French company based in New-York.', question='Where is based Hugging Face ?')

~/anaconda3/envs/transformers/lib/python3.7/site-packages/transformers/pipelines.py in __call__(self, *texts, **kwargs)
    968                 False,
    969             )
--> 970             for example in examples
    971         ]
    972         all_answers = []

~/anaconda3/envs/transformers/lib/python3.7/site-packages/transformers/pipelines.py in <listcomp>(.0)
    968                 False,
    969             )
--> 970             for example in examples
    971         ]
    972         all_answers = []

~/anaconda3/envs/transformers/lib/python3.7/site-packages/transformers/data/processors/squad.py in squad_convert_examples_to_features(examples, tokenizer, max_seq_length, doc_stride, max_query_length, is_training, return_dataset, threads)
    314                 p.imap(annotate_, examples, chunksize=32),
    315                 total=len(examples),
--> 316                 desc="convert squad examples to features",
    317             )
    318         )

~/anaconda3/envs/transformers/lib/python3.7/site-packages/tqdm/std.py in __iter__(self)
   1106                 fp_write=getattr(self.fp, 'write', sys.stderr.write))
   1107 
-> 1108         for obj in iterable:
   1109             yield obj
   1110             # Update and possibly print the progressbar.

~/anaconda3/envs/transformers/lib/python3.7/multiprocessing/pool.py in <genexpr>(.0)
    323                     result._set_length
    324                 ))
--> 325             return (item for chunk in result for item in chunk)
    326 
    327     def imap_unordered(self, func, iterable, chunksize=1):

~/anaconda3/envs/transformers/lib/python3.7/multiprocessing/pool.py in next(self, timeout)
    746         if success:
    747             return value
--> 748         raise value
    749 
    750     __next__ = next                    # XXX

KeyError: 'token_type_ids'
<|||||>Any help would be greatly appreciated!<|||||>use :
pip install transformers==2.5.1
instead of :
pip install transformers<|||||>Thank you @paras55. your solution worked for me!<|||||>Installing `v2.7.0` should work as well.<|||||>2.7.0 fails with the same error (at least with tokenizers==0.5.2)