error when trying to load an empty template

[danbars]

When calling emailEditor.value.editor.loadDesign({}) there's an error thrown from editor.js, and the editor isn't opened.
This used to work, and I'm not sure when exactly is was broken.
Also upgraded from 2.1.4 to 2.1.5 (which has breaking changes that shouldn't exist in a patch version, but that's another story) - and the error still exists.

The solution was to check if the template that I have is "empty" and not call loadDesign.
This is the exception that I get:

editor.js:2 Uncaught (in promise) TypeError: Cannot convert undefined or null to object
    at Object.values (<anonymous>)
    at editor.js:2:3885288
    at produce (editor.js:2:8579012)
    at 16 (editor.js:2:3885265)
    at W (editor.js:2:3890250)
    at W (editor.js:2:3890242)
    at W (editor.js:2:3890242)
    at W (editor.js:2:3890242)
    at W (editor.js:2:3890242)
    at W (editor.js:2:3890242)