Ditty malfunctioning, not correctly interacting with core imagesloaded.js

Hello

Our instalation of ditty is not correctly functioning, seemingly it’s calling imagesloaded.js with an invalid value.

Here is the JavaScript console error:

10:37:39.764 Uncaught TypeError: h is not iterable
    n https://www.mariamontessori.org/wp-includes/js/imagesloaded.min.js?ver=5.0.0:13
    imagesLoaded https://www.mariamontessori.org/wp-includes/js/imagesloaded.min.js?ver=5.0.0:13
    k https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    jQuery 2
        each
        each
    k https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    k https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    init https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    jQuery 2
        each
        each
    init https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    ditty_news_ticker https://www.mariamontessori.org/wp-content/plugins/ditty-news-ticker/legacy/inc/static/js/ditty-news-ticker.min.js?ver=3.1.29:1
    <anonymous> https://www.mariamontessori.org/:803
    jQuery 4
        c
        fireWith
        ready
        q
imagesloaded.min.js:13:430

Clicking on the first navigation link seemingly kickstarts the slider into partially functioning, but the slider content remains hidden.

Please advise.

The page I need help with: [log in to see the link]