I was trying to apply the following code

and I was successful running the code in its own but when I switched in my data there seems to be this error coming up. Any assistance will be appreciated.

```
data_lm_lab = TextLMDataBunch.from_csv('', 'text_data.csv')
learn = language_model_learner(data_lm_lab, pretrained_model=URLs.WT103, drop_mult=0.7)
learn.fit_one_cycle(1, 1e-2)
learn.save_encoder('ft_enc')
```

This is what the data looks like

I get the following error

```
> /usr/local/lib/python3.6/dist-packages/fastai/basic_train.py in validate(model, dl, loss_func, cb_handler, pbar, average, n_batch)
> 55 if n_batch and (len(nums)>=n_batch): break
> 56 nums = np.array(nums, dtype=np.float32)
> ---> 57 if average: return (to_np(torch.stack(val_losses)) * nums).sum() / nums.sum()
> 58 else: return val_losses
> 59
>
> RuntimeError: expected a non-empty list of Tensors
```