Error while using generate.py

Hello, @armancohan @kyleclo @isabelcachola
I am trying to generate a summary from this command given in the repo.
!python generate.py model/ data_input/ out/ --checkpoint_file checkpoint_best.pt --beam 2 --lenpen 0.4 --test_fname test.hypo
Here model is the folder containing checkpoint given for summarization( bart.tldr-aic)
data_input contains test.source file which is a text file containing the source content of the test.jsonl file of scitldr/SciTLDR-Data/SciTLDR-AIC/
out is an empty folder to store the output.

I am getting this error.

Traceback (most recent call last):
File "generate.py", line 100, in
generate_TLDRs(**vars(args))
File "generate.py", line 17, in generate_TLDRs
task='translation'
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/models/bart/model.py", line 112, in from_pretrained
**kwargs,
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/hub_utils.py", line 73, in from_pretrained
arg_overrides=kwargs,
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/checkpoint_utils.py", line 243, in load_model_ensemble_and_task
task = tasks.setup_task(args)
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/tasks/__init__.py", line 27, in setup_task
return TASK_REGISTRY[task_cfg.task].setup_task(task_cfg, **kwargs)
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/tasks/translation.py", line 226, in setup_task
paths = utils.split_paths(args.data)
File "/content/gdrive/My Drive/Internship_SPI_Smita/Scientific_paper_summarization/scitldr/fairseq/fairseq/utils.py", line 59, in split_paths
if "://" not in paths
TypeError: argument of type 'NoneType' is not iterable

Please help me on how to solve this.