select2_multiple style missing

[jakubwalawender]

Hi, I am using select2_multiple field type and it renders like this:

What am I missing?

My code:

$this->crud->addField(
    [
        'label' => "Style",
        'type' => 'select2_multiple',
        'name' => 'styles',
        'entity' => 'styles',
        'attribute' => 'name',
        'pivot' => true,
    ],
);

[jakubwalawender]

In my app.js file i had:
window.$ = window.jQuery = require('jquery');

After removing everything works as expected.