Error while running demo.py

[RandomName-cmd]

When I am trying to run the demo.py file on Google Colab, I am getting the following error with the tokenizer.

ValueError: Non-consecutive added token 'td_colspan' found. Should have index 30522 but has index 1 in saved vocabulary.

Please help me resolve this error.

[see--]

Sounds like a version mismatch problem. Did you install the transformers version from this repo? I.e. this part from the readme:

# get the code
git clone https://github.com/see--/natural-question-answering.git
# install `transformers`
cd natural-question-answering/transformers_repo
sudo python3 setup.py install