Modern Cart JavaScript error

[socialpoint24]

This page is stuck.  https://hostingpoint24.com/clients/cart.php?a=confproduct&i=3

Here's my error.

main.js:60 Uncaught ReferenceError: WHMCS is not defined
    at recalctotals (main.js:60)
    at cart.php?a=confproduct&i=3:307

 

This is line 60 of main.js

 var post = WHMCS.http.jqClient.post("cart.php", 'ajax=1&a=confproduct&calctotal=true&'+jQuery("#orderfrm").serialize());
    post.done(
        function(data) {
            jQuery("#producttotal").html(data);
        }
    );

 

Here's line 307 of cart.php

<script>recalctotals();</script>

 

What's the fix?

[brian!]

whenever you see an error like this, and you're using a custom theme, the first thing to try is to switch to using Six - if you do that with your website, then it works fine with no errors.

my suspicion is that your templates/ADK/js/scripts.min.js is out of date compared to the Six equivalent, but there may be other things going on with your template... you'll know better than I what changes you've made.

also, Modern hasn't been updated in years - so that might be worth bearing in mind for the future.

one final weird thing - nothing to do with the template, but I can order multiple quantities of the same SSL cert (assigned the same domain) from your site... that has to be an incorrect setting!