unexpected errors while downloading datasets from Kaggle API

Kaggle API Version– 1.5.12

I only want to download training dataset named as train in the dataset

Dataset link here
but some unexpected errors are occurring

(tensorflow) parthsharma@Parths-MacBook-Air ~ % kaggle datasets files paultimothymooney/chest-xray-pneumonia                    
 max() arg is an empty sequence

(tensorflow) parthsharma@Parths-MacBook-Air ~ % kaggle datasets download paultimothymooney/chest-xray-pneumonia -f chest_xray/train
 404 - Not Found

(tensorflow) parthsharma@Parths-MacBook-Air ~ % kaggle datasets download paultimothymooney/chest-xray-pneumonia -f train
 404 - Not Found