Importing data to custom table does not work

I tried your instructions on: https://metabox.io/move-custom-fields-data-to-custom-tables/

But I am on oxygen builder, so am wondering how to do this.

I tried the following code and added it to a code snippet, and also tried it as a separate plugin, but no luck at all.

Help MUCH appreciated

function oxygen_child_data_testimonials() {
	if ( empty( $_GET['move-data-testimonials'] ) || ! current_user_can( 'manage_options' ) ) {
		return;
	}

	$paged = isset( $_GET['oxygen-child-paged'] ) ? $_GET['oxygen-child-paged'] : 0;
	$paged += 1;
	$url = add_query_arg( 'oxygen-child-paged', $paged, 'https://www.rugpijnweg.nl/wp-admin/?move-data-testimonials=1' );

	$posts = oxygen_child_admin_records_get_testimonials( $paged );
	if ( empty( $posts ) ) {
		die( 'Done' );
	} 

	foreach ( $posts as $post ) {
		oxygen_child_move_data_testimonials( $post );
	}

	echo "
	<script>
	setTimeout( () => {
		window.location.href = '$url';
	}, 3000 );
	</script>
	";

	die;
}
add_action( 'admin_init', 'oxygen_child_data_testimonials' );

function oxygen_child_admin_records_get_testimonials( $paged = 1 ) {
	$args = [
		'post_type'      => 'reviews',
		'posts_per_page' => 100,
		'paged'          => $paged,
		'fields'         => 'ids',
		'orderby'        => 'ID',
	];
	$query = new WP_Query( $args );
	return $query->posts;
}
function oxygen_child_move_data_testimonials( $post_id ) {
	global $wpdb;

	echo 'Migrating Reviews ', $post_id, '<br>';

	$data = [];

	$data['ID'] = $post_id;

	$data['testie_title'] = get_post_meta( $post_id, 'testie_title', true );
	$data['testie_description'] = get_post_meta( $post_id, 'meta_description', true );
	$data['testie_sandwich_link_text'] = get_post_meta( $post_id, 'testie_sandwich_link_text', true );
    $data['testie_linkto_text'] = get_post_meta( $post_id, 'testie_linkto_text', true );
	$data['testie_header'] = get_post_meta( $post_id, 'testie_header', true );
    $data['testie_slogan'] = get_post_meta( $post_id, 'testie_slogan', true );
    $data['testie_text'] = get_post_meta( $post_id, 'testie_text', true );
    $data['testie_name'] = get_post_meta( $post_id, 'testie_name', true );
    $data['testie_key'] = get_post_meta( $post_id, 'testie_key', true );
    $data['testie_rating'] = get_post_meta( $post_id, 'testie_rating', true );
        
	$data = array_filter( $data ); 
	if ( $data ) {
		$wpdb->insert( 'wp_custom_testies', $data );
	}

	$meta_key_array = [
		'testie_title',
		'testie_description',
		'testie_sandwich_link_text',
        'testie_linkto_text',
        'testie_header',
        'testie_text',
        'testie_name',
        'testie_key',
        'testie_rating',
	];
	$meta_key = "'" . implode( "','", $meta_key_array ) . "'";
	$wpdb->query( $wpdb->prepare( "
		DELETE FROM wpqq_postmeta
		WHERE post_id = %d AND meta_key IN ( $meta_key )",
		$post_id
	) );
}

Hi Long

I added that code to code snippets, but that did not work, apparently oxygen needs different code, can you test that please?

Thanks

Robert