Wysiwyg type field error in Group field

[K15Lmk98]

Sorry, this is an automatic translation.

Clean installation - WP 4.9.1 - Cmb2 2.3.0 - Twentysixteen

Hello,
Using a wysiwyg field, in Group field I receive a Javascript error in console:
"cmb2-conditionals.js?ver=1.0.4:220 Uncaught TypeError: Cannot read property 'replace' of undefined
at CMB2ConditionalsFindDependants (cmb2-conditionals.js?ver=1.0.4:220)"

The first instance of the group has no problems.

But if I create a new instance "Add Another Entry" the error appears.

To solve this problem I modified the file "cmb2-conditionals.js" on line 220.
From:
fieldName = fieldName.replace( /[]$/, '' );
TO:
if ( fieldName ) {
fieldName = fieldName.replace( /[]$/, '' );
}

Is it possible, when you have time, to update the plugin to avoid this error?

Code Cmb2
`/* Hook in and add a metabox to demonstrate repeatable grouped fields */
add_action( 'cmb2_admin_init', 'yourprefix_register_repeatable_group_field_metabox' );
function yourprefix_register_repeatable_group_field_metabox() {
$prefix = 'yourprefix_group_';

/**
 * Repeatable Field Groups
 */
$cmb_group = new_cmb2_box( array(
	'id'           => $prefix . 'metabox',
	'title'        => esc_html__( 'Repeating Field Group', 'cmb2' ),
	'object_types' => array( 'post', 'page' ),
) );

// $group_field_id is the field id string, so in this case: $prefix . 'demo'
$group_field_id = $cmb_group->add_field( array(
	'id'          => $prefix . 'demo',
	'type'        => 'group',
	'description' => esc_html__( 'Generates reusable form entries', 'cmb2' ),
	'options'     => array(
		'group_title'   => esc_html__( 'Entry {#}', 'cmb2' ), // {#} gets replaced by row number
		'add_button'    => esc_html__( 'Add Another Entry', 'cmb2' ),
		'remove_button' => esc_html__( 'Remove Entry', 'cmb2' ),
		'sortable'      => true, // beta
		// 'closed'     => true, // true to have the groups closed by default
	),
) );

/**
 * Group fields works the same, except ids only need
 * to be unique to the group. Prefix is not needed.
 *
 * The parent field's id needs to be passed as the first argument.
 */
$cmb_group->add_group_field( $group_field_id, array(
	'name'       => esc_html__( 'Entry Title', 'cmb2' ),
	'id'         => 'title',
	'type'       => 'text',
	// 'repeatable' => true, // Repeatable fields are supported w/in repeatable groups (for most types)
) );

$cmb_group->add_group_field( $group_field_id, array(
	'name'        => esc_html__( 'Description', 'cmb2' ),
	'description' => esc_html__( 'Write a short description for this entry', 'cmb2' ),
	'id'          => 'description',
	'type'        => 'textarea_small',
) );

$cmb_group->add_group_field( $group_field_id, array(
	'name'    => esc_html__( 'Test wysiwyg', 'cmb2' ),
	'desc'    => esc_html__( 'field description (optional)', 'cmb2' ),
	'id'      => $prefix . 'wysiwyg',
	'type'    => 'wysiwyg',
	'options' => array( 'teeny' => true, 'wpautop' => false, 'media_buttons' => false, 'textarea_rows' => 10 ),
) );

$cmb_group->add_group_field( $group_field_id, array(
	'name' => esc_html__( 'Entry Image', 'cmb2' ),
	'id'   => 'image',
	'type' => 'file',
) );

$cmb_group->add_group_field( $group_field_id, array(
	'name' => esc_html__( 'Image Caption', 'cmb2' ),
	'id'   => 'image_caption',
	'type' => 'text',
) );

}`

Thanks, Claudio_