Fix a handful of Nuance fatals

Summary: Ref T12738. Some of the Nuance "form" workflows currently fatal after work on the GitHub stuff. Try to make everything stop fataling, at least.

Test Plan: Using "Complaints Form" no longer fatals, and now lodges a complaint instead.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T12738

Differential Revision: https://secure.phabricator.com/D18007