Hit Error while using this toolkits

[Ricardokevins]

Loading Named Entity Recognition Pipeline... Loading Relation Extraction Pipeline... Fact Score: 0.5714285714285714 Loading Question Generation Pipeline... Loading Question Answering Pipeline... Traceback (most recent call last): File "testcase.py", line 5, in print(factsumm(article, summary, verbose=False)) File "/usr/local/lib/python3.8/dist-packages/factsumm/init.py", line 366, in call qags_score = self.extract_qas( File "/usr/local/lib/python3.8/dist-packages/factsumm/init.py", line 263, in extract_qas source_answers = self.qa(source, summary_qas) File "/usr/local/lib/python3.8/dist-packages/factsumm/utils/level_sentence.py", line 100, in answer_question pred = qa( File "/usr/local/lib/python3.8/dist-packages/transformers/pipelines/question_answering.py", line 248, in call return super().call(examples[0], **kwargs) File "/usr/local/lib/python3.8/dist-packages/transformers/pipelines/base.py", line 915, in call return self.run_single(inputs, preprocess_params, forward_params, postprocess_params) File "/usr/local/lib/python3.8/dist-packages/transformers/pipelines/base.py", line 923, in run_single outputs = self.postprocess(model_outputs, **postprocess_params) File "/usr/local/lib/python3.8/dist-packages/transformers/pipelines/question_answering.py", line 409, in postprocess min_null_score = min(min_null_score, (start_[0] * end_[0]).item()) ValueError: can only convert an array of size 1 to a Python scalar

while using provided example in README, I meet the Error above ( I use pip install to install this packet and create the python file, copy the example code and run ) pip uninstall and pip reinstall doesn`t help QAQ any suggestion are greatly appreciated!