Unavailable names (“name”) are used for form controls.

Hi,
I have this error when set up a contact form.
I wondered it said “name” is not found but I try to see but nothing is wrong.
Eror: 1 configuration error detected in this tab panel

<div class=”contact_form”>
<div class=”row”>
<div class=”col-lg-6 col-md-6 col-sm-12 col-xs-12″>
<div class=”input-group”>
[text* name placeholder akismet:author “Name *”]
</div>
<div class=”input-group”>
[email* email placeholder akismet:author_email “E-mail *”]
</div>
</div>
<div class=”col-lg-6 col-md-6 col-sm-12 col-xs-12″>
[textarea* message placeholder “Message *”]
</div>
</div>
<div class=”row”>
<div class=”col-lg-6 col-md-6 col-sm-12 col-xs-12″>
<div class=”input-group”>
[checkbox newsletter use_label_element “Subscribe to our newsletter”]
</div>
</div>
<div class=”col-lg-6 col-md-6 col-sm-12 col-xs-12 text-right”>
<div class=”input-group”>
<button class=”button icon_right size-sm theme-wpcf7-submit”>SUBMIT <i class=”stm-arrow-next”></i></button>
</div>
</div>
</div>
</div>