"XMLHttpRequest cannot load file:///... Preflight response is not successful" error

I'm building a website and the page loads a navbar and some other resources with Jquery .load() function (as seen in code below).

<script>
        $(function () {
            $("#navbar-placeholder").load("subpage_navbar.html");
        });
</script>

When viewing the .html files locally on my computer in safari 5 everything works fine, and it used to work fine in safari 11, but now when I try to open the file I get an error:

XMLHttpRequest cannot load file:///... Preflight response is not successful

Are there any preferences I need to change in safari for this to work like it used to?

1 answer