Thank you for the credentials. Looking at the source on the page, the menu is getting created but is not getting the dropdown toggle action correctly.
There are three bootstrap javascript files being loaded on your page, and they're conflicting with one another.
<script src="/media/vendor/bootstrap/js/bootstrap-es5.min.js?5.1.3" nomodule defer></script>
<script src="/media/vendor/bootstrap/js/dropdown.min.js?5.1.3" type="module"></script>
<script src="/templates/shaper_helixultimate/js/bootstrap.bundle.min.js"></script>
Using the browser's developer tools, if we prevent that dropdown.min.js file from loading, the user menu pops up properly. We are not loading that file, so you'll need to investigate what other extension on your site is and try to disable it.
-Melissa