Unable to see any charts on dashboard due to JS error

Starting 2 weeks ago none of the charts on dashboard are displayed.

Console reports:
Uncaught ReferenceError: wp_statistics_get_widget_contents is not defined

In line below.

<div id="wp-statistics-quickstats-div"><div style="width: 100%; text-align: center;"><img src=" https://www.clicdata.com/wp-content/plugins/wp-statistics/assets/images/ajax-loading.gif" alt="Loading..."></div></div>    <script type="text/javascript">
        jQuery(document).ready(function () {
            wp_statistics_get_widget_contents('quickstats', 'wp-statistics-quickstats-div');
        });
    </script>