We have two situations where we are trying to use field masks as described in the Forms Help documentation on a public form. When referencing the js file in the JavaScript on the form, we are using the friendly URL for the form since it is a public form. When looking at developer tools in the Console we are seeing the following error:

Any idea why it is not finding the js file correctly? Here is the JavaScript being used:

$(document).ready(function () {
                $.getScript('https://friendlyurl/Forms/js/jquery.mask.min.js', function () {
                $(".phone input").mask("(999)999-9999");
                });
});

friendlyurl does have the actual domain in it, but I removed it since the form is not yet live. Using Forms 10.2.1.205.