Uncaught SyntaxError: Unexpected token <

Bonjour, J'utilise Spring Boot. J'ai cette structure pour une application de test simple:Pièce jointe 383123

et une page html :
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<!doctype html>
<html  xmlns:th="http://www.thymeleaf.org"
 xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity4"
xmlns:layout="http://www.ultraq.net.nz/thymeleaf/layout">
<head>
    <meta charset="utf-8"/>
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"/>
    <meta name="author" content="Ben Nacer Islem"/>
 
    <meta http-equiv="X-UA-Compatible" content="ie=edge"/>
    <title>Panneau d'administration - SagemCom</title>
    <link rel="stylesheet" type="text/css" href="../static/vendor/simple-line-icons/css/simple-line-icons.css" th:href="@{../vendor/simple-line-icons/css/simple-line-icons.css}"/>
    <link rel="stylesheet" type="text/css" href="../static/vendor/font-awesome/css/fontawesome-all.min.css" th:href="@{../vendor/font-awesome/css/fontawesome-all.min.css}"/>
    <link rel="stylesheet" href="../css/styles.css"/>
 
<!--     
<link rel="stylesheet" type="text/css"
      href="../static/css/bootstrap2.min.css"
      th:href="@{/css/bootstrap2.min.css}"/> -->
 
<link rel="stylesheet" type="text/css"
      href="../static/css/style.css"
      th:href="@{/css/style.css}"/>
 
 
</head>
<body class="sidebar-fixed header-fixed">
    <div class="page-wrapper">
        <nav class="navbar page-header">
            <a href="#" class="btn btn-link sidebar-mobile-toggle d-md-none mr-auto">
                <i class="fa fa-bars"></i>
            </a>
 
            <a class="navbar-brand" href="#">
                <img th:src="@{/imgs/logo.png}" alt="logo"/>
            </a>
 
            <a href="#" class="btn btn-link sidebar-toggle d-md-down-none">
                <i class="fa fa-bars"></i>
            </a>
 
            <ul class="navbar-nav ml-auto">
            <!--<li class="nav-item d-md-down-none">
                <a href="#">
                    <i class="fa fa-bell"></i>
                    <span class="badge badge-pill badge-danger">5</span>
                </a>
            </li>-->
 
            <!--<li class="nav-item d-md-down-none">
                <a href="#">
                    <i class="fa fa-envelope-open"></i>
                    <span class="badge badge-pill badge-danger">5</span>
                </a>
            </li>-->
 
            <li class="nav-item dropdown">
                <a class="nav-link dropdown-toggle" href="#" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                    <img th:src="@{/imgs/avatar-1.png}" class="avatar avatar-sm" alt="logo"/>
                    <span class="small ml-1 d-md-down-none">Islem Ben N</span>
                </a>
 
                <div class="dropdown-menu dropdown-menu-right">
                    <div class="dropdown-header">Compte</div>
 
                    <a href="#" class="dropdown-item">
                        <i class="fa fa-user"></i> Profil
                    </a>
 
                    <a href="#" class="dropdown-item">
                        <i class="fa fa-envelope"></i> Messages
                    </a>
 
                    <div class="dropdown-header">Paramètres</div>
 
                    <a href="#" class="dropdown-item">
                        <i class="fa fa-bell"></i> Notifications
                    </a>
 
                    <a href="#" class="dropdown-item">
                        <i class="fa fa-wrench"></i> Réglages
                    </a>
 
                    <a href="#" class="dropdown-item">
                        <i class="fa fa-lock"></i> Déconnexion
                    </a>
                </div>
            </li>
        </ul>
    </nav>
 
    <div class="main-container">
        <div class="sidebar">
            <nav class="sidebar-nav">
                <ul class="nav">
                    <li class="nav-title">Navigation</li>
 
                    <li class="nav-item">
                        <a href="index.html" class="nav-link">
                            <i class="icon icon-home"></i> Panneau
                        </a>
                    </li>
 
                    <li class="nav-item">
                        <a href="declaration.html" class="nav-link">
                            <i class="icon icon-puzzle"></i> Gestion de incidents
                        </a>
                    </li>
 
                    <li class="nav-item">
                        <a href="#" class="nav-link">
                            <i class="icon icon-grid"></i> Menu Element
                        </a>
                    </li>
 
                    <li class="nav-title">Plus</li>
                    <li class="nav-item">
                        <a href="#" class="nav-link">
                            <i class="icon icon-people"></i> Menu Element
                        </a>
                    </li>
                    <li class="nav-item">
                        <a href="#" class="nav-link">
                            <i class="icon icon-link"></i> Menu Element
                        </a>
                    </li>
 
                </ul>
            </nav>
        </div>
 
        <div class="content">
                <div class="row">
                    <div class="col-md-4">
                        <div class="card">
                        <div class="card-header">
 
                        </div>
 
                        <div class="card-body">
                        <section layout:fragment="content"></section>
                        </div>
                    </div>
                    </div>
                </div>
        </div>
 
 
    </div>
</div>
 
</body>
      <script ttype="text/javascript" th:src="@{/vendor/jquery/jquery.min.js}"></script>
      <script type="text/javascript" th:src="@{/vendor/popper.js/popper.min.js}"></script>
<script type="text/javascript" th:src="@{/vendor/bootstrap/js/bootstrap.min.js}"></script>
<script type="text/javascript" th:src="@{/vendor/chart.js/chart.min.js}"></script>
<script type="text/javascript" th:src="@{/js/carbon.js}"></script>
<script type="text/javascript" th:src="@{/static/js/demo.js}"></script>
</html>
quand je lance la page html dans le navigateur, j'obtiens des erreurs

Pièce jointe 383135

Si quelqu'un à une idée
Merci.