Dataset Viewer issue for wmt16
Thanks for reporting, @lewtun.

~We can't load the dataset locally, so I think this is an issue with the loading script (not the viewer).~

 We are investigating... Recently, there was a merged PR related to this dataset:
- #4554

We are looking at this... Indeed, the above mentioned PR fixed the loading script (it was not working before).

I'm forcing the refresh of the Viewer. Please note that the above mentioned PR also made an enhancement in the `datasets` library, required by this loading script. This enhancement will only be available to the Viewer once we make our next release. OK, it's working now.

https://huggingface.co/datasets/wmt16/viewer/ro-en/test

<img width="1434" alt="Capture d’écran 2022-09-08 à 10 15 55" src="https://user-images.githubusercontent.com/1676121/189071665-17d2d149-9b22-42bf-93ac-1a966c3f637a.png">
 Thank you @severo !!
### Link

https://huggingface.co/datasets/wmt16

### Description

[Reported](https://huggingface.co/spaces/autoevaluate/model-evaluator/discussions/12#62cb83f14c7f35284e796f9c) by a user of AutoTrain Evaluate. AFAIK this dataset was working 1-2 weeks ago, and I'm not sure how to interpret this error.

```
Status code:   400
Exception:     NotImplementedError
Message:       This is a abstract method
```

Thanks!

### Owner

No