Expected behavior No TypeError when JS for $(".button-collapse").sideNav() is called

Actual behavior

TypeError: $('.button-collapse').sideNav is not a function. (In '$('.button-collapse').sideNav()', '$('.button-collapse').sideNav' is undefined)

Resources (screenshots, code snippets etc.)

APP: Rails application, ver 5.2.3, ruby 2.6.3. Loading MDB-pro JS at the last item of the body tag.

    <script
    src="https://decisely-dpc.s3-us-west-2.amazonaws.com/cdn/1-mdb-pro-4.14.1.min.js">>> </script>
   </body>

HTML: SideNav called on page as:

<a href="#" data-activates="slide-out" class="button-collapse"><i class="menu-bars fas fa-bars"></i></a>

JS: Using CoffeeScript

Called from

 $(document).on 'turbolinks:load', ->
$('.button-collapse').sideNav()