ERROR! need more than 2 values to unpack while using ansible commands

Upgraded to Ansible 2.0.0.2 via brew and can’t run any of the core ansible commands on OSX.

ansible localhost -m ping -vvvv

Using /Users/bryanyu/Projects/data-repo/ansible/ansible.cfg as config file
ERROR! need more than 2 values to unpack

I am not using any spaces in my group names. (#13917) and my ansible.cfg file is standard. Here is my inventory file:

cat inventory/base

[localhost]
127.0.0.1

Empty tags for aliases

[tag_Name_hermes_loader]
[tag_Name_test_loader]

Groups populated by aliases

[dataloader:children]
tag_Name_hermes_loader

[testloader:children]
tag_Name_test_loader

Any help?