Hello guys, i’m having a strange issue, when i want to save a widget, it reset all my fields and is not saving nothing!

here is my code and a gift showing error

promotions-form.php

<?php

 piklist('field', array(
    'type' => 'group'
    ,'field' => 'lt_box_promotions'
    ,'add_more' => true
    ,'fields' => array(
      array(
        'type' => 'file'
        ,'field' => 'lt_box_image'
        ,'columns' => 12
        ,'label' => __('Agregar imagen','piklist')
        ,'description' => __('Seleccione la imagen que desea mostrar en la promoción','piklist')
        ,'options' => array(
            'basic' => false
            ,'multiple' => false
        )
      )
       ,array(
        'type' => 'text'
        ,'field' => 'lt_box_link'
        ,'columns' => 12
        ,'attributes' => array(
          'placeholder' => 'Enlace (link)'
        )
      )
      ,array(
        'type' => 'radio'
        ,'field' => 'tc_box_open'
        ,'columns' => 12
        ,'label' => __('¿Abre en otra pestaña?','piklist')
	    ,'choices' => array(
	      0 => 'No',
	      1 => 'Si'
	    )
      )
    )
  ));

promotions.php

<?php
/*
Title: Hot Topix: Promotions
Description: Widget para añadir promociones
*/
?>

<?php echo $before_widget; ?>
 

<ul class="bxslider">
	<?php foreach($settings['lt_box_promotions'] as $slide){ ?>
		<?php $image = wp_get_attachment_image_src(
					$slide['lt_box_image'][0],
					'medium', //size full,medium,thumbnail
					false //icon
			  ); ?>
		<li>
			<?php 
				if($slide['lt_box_link'] != ""){ 
					//verificar si abre en otra pestaña
					$openInBlankPage = $slide['tc_box_open'][0];
			?>
				<a href="<?= $slide['lt_box_link'] ?>"
				  <?php if($openInBlankPage == 1){ echo 'target="_blank"'; } ?>
				>
					<img src="<?= $image[0] ?>" />
				</a>
			<?php }else{?>
				<img src="<?= $image[0] ?>" />
			<?php }?>
		</li>
	<?php } ?>
</ul>

 
<?php echo $after_widget; ?>