the site is in localhost, you can see the form in backoffice here:
<div class="form-group col-sm-6">
[text* nom id:nom class:form-control placeholder "Nom"]</div>
<div class="form-group col-sm-6">
[text* email id:email class:form-control placeholder "E-mail"]</div>
<div class="form-group col-sm-12">
[textarea* message id:message class:form-control placeholder "Message"]</div>
<div class="form-group button">
<button type="submit">Envoyer <i class="fa fa-chevron-right"></i></button>
[submit "Envoyer" type:hidden]</div>
and the result:
<div class="col-sm-7 formulaire"><div class="wpcf7" id="wpcf7-f15-o1">
<div class="screen-reader-response"></div>
<form action="/belugas/#wpcf7-f15-o1" method="post" class="wpcf7-form row" novalidate="novalidate">
<div style="display: none;">
<input type="hidden" name="_wpcf7" value="15" />
<input type="hidden" name="_wpcf7_version" value="3.8.1" />
<input type="hidden" name="_wpcf7_locale" value="fr_FR" />
<input type="hidden" name="_wpcf7_unit_tag" value="wpcf7-f15-o1" />
<input type="hidden" name="_wpnonce" value="e8527c56db" />
</div>
<div class="form-group col-sm-6">
<span class="wpcf7-form-control-wrap nom"><input type="text" name="nom" value="" size="40" class="wpcf7-form-control wpcf7-text wpcf7-validates-as-required form-control" id="nom" aria-required="true" aria-invalid="false" placeholder="Nom" /></span></div>
<div class="form-group col-sm-6">
<span class="wpcf7-form-control-wrap email"><input type="text" name="email" value="" size="40" class="wpcf7-form-control wpcf7-text wpcf7-validates-as-required form-control" id="email" aria-required="true" aria-invalid="false" placeholder="E-mail" /></span></div>
<div class="form-group col-sm-12">
<span class="wpcf7-form-control-wrap message"><textarea name="message" cols="40" rows="10" class="wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required form-control" id="message" aria-required="true" aria-invalid="false" placeholder="Message"></textarea></span></div>
<div class="form-group button">
<button type="submit">Envoyer <i class="fa fa-chevron-right"></i></button><br />
<input type="submit" value="Envoyer" class="wpcf7-form-control wpcf7-submit" /></div>
<div class="wpcf7-response-output wpcf7-display-none"></div>
</form></div>
I fill only the "message" field, and when I send it... there is no error but this: "Votre message a bien été envoyé. Merci."
If I don't fill the "message "field", it say me that it's empty but not the other two.