Issue with Navbar Responsiveness in MDB Standard v5.1.0

Hi, I’m working on a firearms training website using MDB Standard v5.1.0. I set up a responsive navbar with a toggler for mobile view, but the collapse/expand behavior isn’t working properly. On smaller screens, the menu button appears, but clicking it doesn’t expand the navigation links.

I followed the docs and included the required CSS/JS files, but maybe I’m missing something. MDB Navbar Test Castle Keepers

  <!-- Toggler -->
  <button
    class="navbar-toggler"
    type="button"
    data-mdb-toggle="collapse"
    data-mdb-target="#navbarNav"
    aria-controls="navbarNav"
    aria-expanded="false"
    aria-label="Toggle navigation"
  >
    <i class="fas fa-bars"></i>
  </button>

  <!-- Collapsible content -->
  <div class="collapse navbar-collapse" id="navbarNav">
    <ul class="navbar-nav ms-auto mb-2 mb-lg-0">
      <li class="nav-item">
        <a class="nav-link active" aria-current="page" href="#">Home</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Training</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Safety</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" href="#">Contact</a>
      </li>
    </ul>
  </div>
  <!-- Collapsible content -->
</div>

Has anyone run into this issue? Do I need to initialize JavaScript manually, or should it work out of the box?

Thanks in advance for any guidance!