Issue during downloading "roberta-base-config.json"

[AhmedHussKhalifa]

Hey,

I have a problem with running run_warmup.py.

`During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "../drivers/run_warmup.py", line 756, in
main()
File "../drivers/run_warmup.py", line 732, in main
args.train_model_type, args)
File "../drivers/run_warmup.py", line 304, in load_stuff
cache_dir=args.cache_dir if args.cache_dir else None,
File "/scratch/h2amer/ahamsala/torch_DPR/lib/python3.6/site-packages/transformers/configuration_utils.py", line 176, in from_pretrained
config_dict, kwargs = cls.get_config_dict(pretrained_model_name_or_path, **kwargs)
File "/scratch/h2amer/ahamsala/torch_DPR/lib/python3.6/site-packages/transformers/configuration_utils.py", line 243, in get_config_dict
raise EnvironmentError(msg)
OSError: Couldn't reach server at 'https://s3.amazonaws.com/models.huggingface.co/bert/roberta-base-config.json' to download pretrained model configuration file.`