Bootstrap-Select Is Not Working with Bootstrap 5

I followed the Getting Started guide from their official webpage

I added the JS and CSS libraries to my project and it does not work.

For some reason selectpicker is set to display: none!important:

    .bootstrap-select>select.bs-select-hidden, select.bs-select-hidden, select.selectpicker {
        display: none!important;
    }

And I am getting this error:

Caused by this JS: <script src=""></script>

What I've tried:

• Even if I change the code to display: block bootstrap-select it is still not working.
• Changing the order of the imports as suggested in another SO question

I already checked this previous SO question and I changed the order of the imports but still, it is not working.

JS FIDDLE DEMO