Suis Bootstrap tidak berfungsi dengan betul apabila halaman web diubah saiznya-Soal Jawab Rangkaian PHP Cina

Ini kodnya:

<nav xmlns:sec="http://www.thymeleaf.org/extras/spring-security"  class="navbar navbar-expand-lg fixed-top container-fluid" id="navbar">
<div class="container px-4">
    <a class="navbar-brand" href="/main"> <img src="https://i.imgur.com/BKHVvT0.png" style="width: 100px; height: auto;"> </a>
    <button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target="#navbarResponsive" aria-controls="navbarResponsive" aria-expanded="false" aria-label="Toggle navigation"><span class="navbar-toggler-icon"></span></button>
    <div class="collapse navbar-collapse" id="navbarResponsive">
        <ul class="navbar-nav ms-auto">
            <li  sec:authorize="isAnonymous()" class="nav-item"><a class="nav-link" href="/login">Inicio sesión</a></li>
            <li  sec:authorize="isAnonymous()" class="nav-item"><a class="nav-link" href="/register">Registro Cliente</a></li>
            <li  sec:authorize="isAnonymous()" class="nav-item"><a class="nav-link" href="/registrohotel">Registro Hotel</a></li>

            <li sec:authorize="hasAuthority('CLIENTE')" class="nav-item"><a class="nav-link" href="/historialReservaClienteVigentes">Tus reservas</a></li>
            <li sec:authorize="hasAuthority('CLIENTE')" class="nav-item"><a class="nav-link" href="/perfilcliente">Perfil</a></li>
            <li sec:authorize="hasAuthority('CLIENTE')" class="nav-item"><a sec:authorize="isAuthenticated()" class="nav-link" th:href="@{/logout}"> <i class=" fas fa-door-open"></i></a></li>

            <li sec:authorize="hasAuthority('HOTEL')" class="nav-item"><a class="nav-link" href="/admin">Administrador</a></li>
            <li sec:authorize="hasAuthority('HOTEL')" class="nav-item"><a class="nav-link" href="/perfilhotel">Perfil</a></li>
            <li sec:authorize="hasAuthority('HOTEL')" class="nav-item"><a sec:authorize="isAuthenticated()" class="nav-link" th:href="@{/logout}"> <i class="   fas fa-door-open"></i></a></li>

        </ul>
    </div>
</div>

Perkaranya ialah ia kelihatan pada skrin, tetapi apabila berinteraksi dengannya, ia tidak melakukan apa-apa. Bahagian bawah penukar memang muncul, tetapi apabila diklik, ia tidak menjadikan item navigasi muncul di atasnya.

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