Cannot read property ‘nonce’ of undefined

When you click submit before all required fields are filled out, nf returns an error in console.

Uncaught TypeError: Cannot read property 'nonce' of undefined
    at N.d.resetLabel (front-end.js?ver=3.4.12:1)
    at s (backbone.min.js?ver=1.2.3:1)
    at r (backbone.min.js?ver=1.2.3:1)
    at m (backbone.min.js?ver=1.2.3:1)
    at u.Channel.k.trigger (backbone.min.js?ver=1.2.3:1)
    at u.Channel.submit (front-end.js?ver=3.4.12:3)
    at Object.u._callHandler (front-end-deps.js?ver=3.4.12:23)
    at u.Channel.request (front-end-deps.js?ver=3.4.12:23)
    at N.d.click (front-end.js?ver=3.4.12:1)
    at s (backbone.min.js?ver=1.2.3:1)