text: Title:  AttributeError: '_MultiProcessingDataLoaderIter' object has no attribute 'next'
  Body: Hi.
  I am currently trying to train my own model.
  I obtained the dataset as required and modified the config file. However, I get this error when trying to train.
  I have already tried to decrease workers in config file.
  I also tried to modify the dataset.py file, line 101 from
  image, text = data_loader_iter.next() 
  to
  image, text = next(data_loader_iter)
  
  However, the error persist.
  
  Thanks