Huggingface Dataset reviews missing data?

I downloaded the reviews dataset subset from the huggingface, and all the reviews data  are missing values!

rev_dataset = load_dataset("peer_read", 'reviews', split="train")
The review's 'column' is all missing values/lists. e.g. {'date': [], 'title': [], 'other_keys': [], 'o...`

Is this an error in the uploaded dataset? Thanks!