Cannot download opus dataset
Hi ! it seems "en-zh" doesn't exist for this dataset

You can see the list of subsets here: https://huggingface.co/datasets/Helsinki-NLP/opus_books
When I tried to download opus_books using:

from datasets import load_dataset
dataset = load_dataset("Helsinki-NLP/opus_books")

I got the following errors:
FileNotFoundError: Couldn't find any data file at /workspace/Helsinki-NLP/opus_books. Couldn't find 'Helsinki-NLP/opus_books' on the Hugging Face Hub either: LocalEntryNotFoundError: An error happened while trying to locate the file on the Hub and we cannot find the requested files in the local cache. Please check your connection and try again or make sure your Internet connection is on.

I also tried:
dataset = load_dataset("opus_books", "en-zh")

and the errors remain the same. However, I can download "mlabonne/FineTome-100k" successfully. 
My datasets is version 4.2.0

Any clues? Big thanks.