obj is not iterable

After updating this script from 4.1.0 to 5.0.0 without any changes of initialization code, it's now thrown error and doesn't work:

Uncaught TypeError: obj is not iterable

Initialization code:

$('.js-b').each(function () {
    console.log($(this));
    $(this).imagesLoaded().done(function () {
      ...
    });
});

console.log => Object { 0: div.all-b.vertical-b.js-b, context: div.all-b.vertical-b.js-b, length: 1 }