javascript error while using shortcode

Hej,
I am trying to use your plugin. Basically it works, however, it throws a javascript error:

Uncaught TypeError: element_ is undefined
    initialize https://www.kraemerladen.bio/wp-content/plugins/shipping-zones-by-drawing-for-woocommerce//assets/szbd-shortcode.min.js?ver=2.5.2:2
    <anonymous> https://www.kraemerladen.bio/wp-content/plugins/shipping-zones-by-drawing-for-woocommerce//assets/szbd-shortcode.min.js?ver=2.5.2:2
    forEach Underscore
    <anonymous> https://www.kraemerladen.bio/wp-content/plugins/shipping-zones-by-drawing-for-woocommerce//assets/szbd-shortcode.min.js?ver=2.5.2:2
    jQuery 2

szbd-shortcode.min.js:2:870

Any idea? The shortcode I am using is: [szbd ids=”49908″ title=”Unser Liefergebiet” color=”white”]

Thanks,
jochen

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