Django Form Work，但是当我添加div时不再发布

Question

此代码可以正常工作，我单击“发送”，然后立即发送电子邮件。

<form role="form" action="" method="post" class="form-area contact-form text-right" id="myForm">
                    {% csrf_token %}
                    <input type="text" name="contact_name" required id="id_contact_name" placeholder="Name: " />
                    <input type="email" name="contact_email" required id="id_contact_email" placeholder="Email: " />
                    <textarea placeholder="Message: " name="content" cols="40" rows="10" required id="id_content"></textarea>
                    <button type="submit">Submit</button>
                </form>

但是当我添加div和使它看起来像我想要的东西时，我填写表格，单击“发送”，但没有任何反应，cmd告诉我mail.php 404

ej，这个

<form role="form" action="" method="post" class="form-area contact-form text-right" id="myForm">
                    {% csrf_token %}
                    <span class="row">
                        <span class="col-lg-6 form-group">
                            <input class="common-input mb-20 form-control" id="form_contact_name" type="text" name="contact_name" required id="id_contact_name" placeholder="Name: " />
                            <input class="common-input mb-20 form-control" id="form_contact_email" type="email" name="contact_email" required id="id_contact_email" placeholder="Email: " />
                        </span>
                        <span class="col-lg-6 form-group">
                            <textarea class="common-input mb-20 form-control" placeholder="Message: " name="content" cols="40" rows="10" required id="id_content"></textarea>
                        </span>
                        <span class="col-lg-12">
                            <button class="btn btn-outline-success" type="submit">Submit</button>
                        </span>
                    </span>
                </form>

你们知道为什么吗，据我所知div放入表格时应该不会出现任何问题