"Uncaught TypeError" when adding field to new schema

[joshiefishbein]

What I expected to happen

I want to create a new field in a new schema on a new content model (Millions > Block: Community Registration > Field: Community Functions)

What happened instead

I stepped through creating and publishing a new content model with 3 fields:

• Text:title
• Fragment:communityFunctions
• Media:images

I then went to create an entry for this content model and was able to add a title and images, but upon stepping through adding schema I encountered this error. I can click "Setup Schema" and receive the expected result, but upon clicking "Add Field" the first time nothing happens to the UI. I open the console to find the error below:

Uncaught TypeError: Cannot read property 'pushObject' of undefined
    at r.addSchemaField (contentful-fragment-42ef4b44ac540fbd1a92dcd273a68b42.js:58)
    at r.addEmptySchemaField (contentful-fragment-42ef4b44ac540fbd1a92dcd273a68b42.js:13)
    at r.send (vendor-41efc319637f06f350e3043c1913afe6.js:3090)

I can reproduce this and see the error only occurring when I try to add the first field.