错误：X-Content-Type-Options：使用托管后，nosniff，MIME“ text / html”

如何解决错误：X-Content-Type-Options：使用托管后，nosniff，MIME“ text / html”

今天，我第一次在infinityfree上使用托管。所有网站都能正常运行，但是引导程序中有两个元素（下拉菜单）。该错误是由于MIME类型（“ text / html”）不匹配X-Content-Type-Options：nosniff。

我可以做什么？我在乞讨，感到有点迷茫。从我所读的内容中，我应该在htaccess文件中添加标题，但是在infinityfree上，该文件是只读的。有什么我可以做的，还是服务器设置很明显，我无法解决？

<nav class="navbar navbar-dark navbar-expand-lg">
  <a class="navbar-brand" href="index.PHP">Nova Art</a>
  <button class="navbar-toggler " type="button" data-toggle="collapse" data-target="#menu" aria-controls="menu"
    aria-expanded="false" aria-label="Navigation">
    <span class="navbar-toggler-icon"></span>
  </button>

  <div class="collapse navbar-collapse" id="menu">
    <ul class="navbar-nav mr-auto">
      <li class="nav-item active"><a class="nav-link" href="index.PHP">Main Page</a></li>
      <li class="nav-item dropdown"><a class="nav-link dropdown-toggle" data-toggle="dropdown" role="button"
          aria-expanded="false" id="submenu" aria-haspopup="true" href="#">Categories</a>

        <div class="dropdown-menu" aria-labbeledby="submenu">

          <form class="dropdown-item" method="POST" action="category.PHP">
            <input class="category" type="submit" name="category" value="Photography" />
          </form>

          <form class="dropdown-item" method="POST" action="category.PHP">
            <input class="category" type="submit" name="category" value="Digital" />
          </form>

          <form class="dropdown-item" method="POST" action="category.PHP">
            <input class="category" type="submit" name="category" value="Drawings" />
          </form>

          <form class="dropdown-item" method="POST" action="category.PHP">
            <input class="category" type="submit" name="category" value="Paintings" />
          </form>

        </div>
      </li>
      <li class="nav-item"><a class="nav-link" href="profile.PHP">My profile</a></li>
      <?PHP
        if(isset($_SESSION['logged']) && ($_SESSION['logged']==true)){
            echo '<li class="nav-item" ><a href="loggout.PHP" class="nav-link " >logout</a></li>';
        }
        else echo '<li class="nav-item" ><a class="nav-link " href="logWindow.PHP">Login</a></li>';
      ?>

    </ul>
    <form action="search.PHP" method="POST" class="form-inline">
      <input type="text" class="form-control mr-1 mt-3 logWin" placeholder="Find user" name="search" />
    </form>
  </div>
</nav>

感谢所有帮助！