incompatibility with ninja forms

[seegodesign]

When a ninja forms contact form is added to a page, tailoring that page results in this error, coming from plugins/tailor-advanced/assets/js/dist/canvas.min.js?ver=1.0.2

Uncaught TypeError: Cannot set property 'tailor_image' of undefined
at n. (canvas.min.js:1)
at _ (backbone.min.js:1)
at m (backbone.min.js:1)
at f (backbone.min.js:1)
at n.u.trigger (backbone.min.js:1)
at Object._triggerMethod (backbone.marionette.min.js:1)
at n.f.triggerMethod (backbone.marionette.min.js:1)
at n.start (backbone.marionette.min.js:2)
at HTMLDocument. (canvas.min.js:1)
at i (jquery.js:2)