Error on reload page by form action using aletheme

Hello people!

I made a form using the model of the SOCHA theme (aletheme) that works fine on my contact page, but does not work in my posts.

When I filling out the form and click “Submit”, it does does not submit the data and reload the page (that loads incomplete).

What might be happening?

CODE OF MY FORM:

<div class="formbox">
 <?php if (isset($_GET['success'])) : ?>
<p><?php _e('Seu email foi enviado com sucesso, obrigado!', 'aletheme')?></p>
<?php endif; ?>
<?php if (isset($error) && isset($error['msg'])) : ?>
<p><?php echo $error['msg']?></p>
<?php endif; ?>
<form method="post" action="<?php the_permalink();?>">
<div id="tabform">
<div>
<label>Sujet du e-mail:</label>
<input type="text" name="contact[voyage]" placeholder="<?php wp_title(); ?>" value="<?php echo isset($_POST['contact']['voyage']) ? $_POST['contact']['voyage'] : ''?>" required="required" id="contact-form-voyage" />
</div>
<div>
<label>Votre nom:*</label>
<input type="text" name="contact[name]" value="<?php echo isset($_POST['contact']['name']) ? $_POST['contact']['name'] : ''?>" required="required" id="contact-form-name" />
</div>
<div>
<label>Nom de famille:*</label>
<input type="text" name="contact[lastname]" value="<?php echo isset($_POST['contact']['lastname']) ? $_POST['contact']['lastname'] : ''?>" required="required" id="contact-form-last-name" />
</div>
<div>
<label>Votre e-mail:*</label>
<input type="email" name="contact[email]" value="<?php echo isset($_POST['contact']['email']) ? $_POST['contact']['email'] : ''?>" required="required" id="contact-form-email" />
</div>
<div>
<label>Votre téléphone:</label>
<input type="tel" name="contact[phone]" value="<?php echo isset($_POST['contact']['phone']) ? $_POST['contact']['phone'] : ''?>" id="contact-form-phone" />
 </div>
<div>
<label>Saisissez votre message:*</label>
<textarea name="contact[message]"  id="contact-form-message" cols="40" rows="5" required="required"><?php echo isset($_POST['contact']['message']) ? $_POST['contact']['message'] : ''?></textarea>
</div>
<div>
<input type="image" src="bt_envoyer.png" class="submit" name="submit" value="<?php _e('Send', 'aletheme')?>" />
<input type="image" src="bt_propre.png" class="reset" name="reset" tabindex="5" value="<?php _e('Clear', 'aletheme')?>" />
</div>
</div>
<?php wp_nonce_field() ?>
</form>
</div>