How to display Category Metabox fields in frontend ?

Hello,
this is my CMB2 Code :

<?php 

if ( file_exists( dirname( __FILE__ ) . '/CMB2/init.php' ) ) {
	require_once dirname( __FILE__ ) . '/CMB2/init.php';
} 

add_action( 'cmb2_admin_init', 'tw_term_meta' );
/**
 * Define the metabox and field configurations.
 */
function tw_term_meta() {

	/**
	 * Initiate the metabox
	 */
    $prefix = 'tw_term_';
	$cmb = new_cmb2_box( array(
		'id'            => $prefix . 'tw_hero_meta',
		'title'         => __( 'Hero', 'tw' ),
		'object_types'     => array( 'term' ), // Tells CMB2 to use term_meta vs post_meta 
 		'taxonomies'       => array( 'category' ),
		'context'       => 'normal',
		'priority'      => 'high',
		'show_names'    => true, // Show field names on the left
		// 'cmb_styles' => false, // false to disable the CMB stylesheet
		// 'closed'     => true, // Keep the metabox closed by default
	) );

	// File Upload field
	$cmb->add_field( array(
		'name'       => __( 'Background :', 'tw' ),
		'desc'       => __( 'image de fond qui appara?tra au hero (Upload an image or enter a URL).', 'tw' ),
		'id'         => $prefix . 'background',
		'type'       => 'file',
		'show_on_cb' => 'cmb2_hide_if_no_cats', // function should return a bool value
		// 'sanitization_cb' => 'my_custom_sanitization', // custom sanitization callback parameter
		// 'escape_cb'       => 'my_custom_escaping',  // custom escaping callback parameter
		// 'on_front'        => false, // Optionally designate a field to wp-admin only
		// 'repeatable'      => true,
	) );
	$cmb->add_field( array(
		'name'    => 'Titre',
		'desc'    => 'titre du hero (optional)',
		//'default' => 'standard value (optional)',
		'id'      => $prefix . 'main_title',
		'type'    => 'text',
	) );
	$cmb->add_field( array(
		'name'    => 'Short description',
		'desc'    => 'Sous titre du hero (optional)',
		//'default' => 'standard value (optional)',
		'id'      => $prefix . 'short_desc',
		'type'    => 'textarea',
	) );	
    $cmb->add_field( array(
        'name' => 'Bouton CTA contact',
        'desc' => 'Activer bouton qui renvoie à contact.',
        'id'   => $prefix . 'buttoncta',
        'type' => 'checkbox',
	) );
	
	$cmb->add_field( array(
        'name' => 'Bouton CTA newsletter',
        'desc' => 'Activer bouton qui renvoie à newsletter.',
        'id'   => $prefix . 'buttonnewsletter',
        'type' => 'checkbox',
    ) );

}

and this is my code in category.php

<div class="banner-area">
        <div class="bg-banner" style="background-image: url(<?php echo get_term_meta( get_the_ID(), 'tw_term_background', true );?>)"></div>
        <div class="container">
            <div class="headline">
                <?php $maintitle = get_term_meta( get_the_ID(), 'tw_term_main_title', true );
                ?>
                <h1><?php echo $maintitle; ?></h1>
                
                  
            </div>
        </div>
    </div>

where is the probleme?