Download Object Errror

Hi, mattdeitke
While downloading, I encountered some issues. Here is the script I used:
```
annotations = oxl.get_annotations(download_dir="~/.objaverse" )
sampled_df = annotations.groupby('fileType').apply(lambda x: x.sample(1)).reset_index(drop=True)
sampled_df = sampled_df[sampled_df['fileType'] == 'obj'].reset_index(drop=True)
oxl.download_objects(download_dir='./objaverse', objects=sampled_df, processes=1)
```

where I sampled a random `.obj` object, but I couldn't download it successfully. It seems to be related to the website's response. Do you have any suggestions?