WordPress联系人表单7验证不起作用

我在表单字段中使用class:必填，但验证无效

<div class="request-form animation" data-animation="fadeInRight">
    <h4>REQUEST AN ESTIMATE</h4>
    <div style="margin-bottom: 18px">Our estimates are free, professional and fair. Most estimates require a site visit. </div>
    [text Full Name class:input-custom class:input-full placeholder class:required "Name:"]
    [text Phone class:input-custom class:input-full placeholder class:required "Phone:"]
    [text E-mail class:input-custom class:input-full placeholder class:required "Email:"]
    [textarea Message class:input-custom class:input-full placeholder class:required "Message:"]
    [submit class:btn class:btn-light "SEND MESSAGE"]
</div>

要求估价
我们的估算是自由、专业和公平的。大多数评估都需要实地考察。
[文本全名类：输入自定义类：输入完整占位符类：必需的“名称：”]
[文本电话类：输入自定义类：输入完整占位符类：必需的“电话：”]
[文本电子邮件类：输入自定义类：输入完整占位符类：必需的“电子邮件：”]
[textarea消息类：输入自定义类：输入完整占位符类：必需的“消息：”]
[提交类别：btn类别：btn指示灯“发送消息”]

您错误地将*添加到输入类型之后

要使表单字段成为CF7中所需的字段，您必须在输入类型之后添加*。 例如

因此，只需将代码替换为以下内容

<div class="request-form animation" data-animation="fadeInRight">
    <h4>REQUEST AN ESTIMATE</h4>
    <div style="margin-bottom: 18px">Our estimates are free, professional and fair. Most estimates require a site visit. </div>
    [text* Full Name class:input-custom class:input-full placeholder "Name:"]
    [text* Phone class:input-custom class:input-full placeholder "Phone:"]
    [text* E-mail class:input-custom class:input-full placeholder "Email:"]
    [textarea* Message class:input-custom class:input-full placeholder "Message:"]
[submit class:btn class:btn-light "SEND MESSAGE"]

要求估价
我们的估算是自由、专业和公平的。大多数评估都需要实地考察。
[文本*全名类：输入自定义类：输入完整占位符“名称：”]
[文本*电话类：输入自定义类：输入完整占位符“电话：”]
[文本*电子邮件类：输入自定义类：输入完整占位符“电子邮件：”]
[textarea*消息类：输入自定义类：输入完整占位符“消息：”]
[提交类别：btn类别：btn指示灯“发送消息”]

<div class="request-form animation" data-animation="fadeInRight">
    <h4>REQUEST AN ESTIMATE</h4>
    <div style="margin-bottom: 18px">Our estimates are free, professional and fair. Most estimates require a site visit. </div>
    [text* Full Name class:input-custom class:input-full placeholder "Name:"]
    [text* Phone class:input-custom class:input-full placeholder "Phone:"]
    [text* E-mail class:input-custom class:input-full placeholder "Email:"]
    [textarea* Message class:input-custom class:input-full placeholder "Message:"]
[submit class:btn class:btn-light "SEND MESSAGE"]