WARNING: Automatic signature extraction failed: Traceback (most recent call last):

 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 957, in _decrypt_signature
video_id, player_url, len(s)

 "/usr/lib/python2.7/dist-packages/youtube_dl/extractor/youtube.py", line 331, in _extract_signature_function
player_type = id_m.group('ext')AttributeError: 'NoneType' object has no attribute 'group'
>Traceback (most recent call last):


 "tools/run.py", line 88, in <module>

run()


 "tools/run.py", line 75, in run

trainer.train()


 "pythia_m4c/mmf/pythia/trainers/base_trainer.py", line 226, in train

for batch in self.train_loader:


 "pythia_m4c/lib/python3.5/site-packages/torch-1.5.0-py3.5-linux-x86_64.egg/torch/utils/data/dataloader.py", line 345, in __next__

data = self._next_data()


 "pythia_m4c/lib/python3.5/site-packages/torch-1.5.0-py3.5-linux-x86_64.egg/torch/utils/data/dataloader.py", line 856, in _next_data

return self._process_data(data)


 "pythia_m4c/lib/python3.5/site-packages/torch-1.5.0-py3.5-linux-x86_64.egg/torch/utils/data/dataloader.py", line 881, in _process_data

data.reraise()


 "pythia_m4c/lib/python3.5/site-packages/torch-1.5.0-py3.5-linux-x86_64.egg/torch/_utils.py", line 395, in reraise

raise self.exc_type(msg)
RuntimeError: Caught RuntimeError in DataLoader worker process 0.
