The link specified here does not work: https://github.com/LPDI-EPFL/masif/blob/2a370518e0d0d0b0d6f153f2f10f6630ae91f149/source/data_preparation/00-pdb_download.py#L27 It needs to be updated with: `ftp://ftp.rcsb.org/` as specified [here](https://www.rcsb.org/docs/programmatic-access/file-download-services#file-access-urls-).