Tutorial issues

Hi there, I am pretty new to using halotools, so I am trying trying to get a sense of the package by working through some of the available tutorials. I have downloaded the default halo catalogs and am working through the tutorial "Galaxy Catalog Analysis Example: Galaxy-galaxy lensing." However, when I copy and paste the first chunk of code into my notebook and try to run it, I get the following error: 'CachedHaloCatalog' object has no attribute '_halo_table'. I have also downloaded some of the jupyter notebooks from the documents section and tried to run them myself, and the same error message popped up. I would really appreciate any help!