$ mkdocs serve
INFO - Building documentation...
WARNING - Config value: 'site_favicon'. Warning: Unrecognised configuration name: site_favicon
WARNING - Config value: 'theme_dir'. Warning: Unrecognised configuration name: theme_dir
ERROR - Config value: 'markdown_extensions'. Error: Failed loading extension "toc(permalink=true)".
Aborted with 1 Configuration Errors!
Judging from the name of the extension, this could be causing the issue in dev.cityofchicago.org that prevents navigation to docs pages from any page (Chicago/dev.cityofchicago.org#88).
Judging from the name of the extension, this could be causing the issue in dev.cityofchicago.org that prevents navigation to docs pages from any page (Chicago/dev.cityofchicago.org#88).