Mac Client -> Can't get past Usage data preferences in setup

Trying to setup the Mac Client. Clicking the Next button in the Usage data preferences section throws this error in Chrome console:

http://localhost:13963/api/setup Failed to load resource: the server responded with a status of 400 (Bad Request)

Turns out if you only put a space in the department field, it will let you continue, but will fail to start the API setup endpoint. Putting any text in that field will allow the setup flow to continue.