_addon_items Array Error

Hello,

I am using the built-in addons of woocommerce product, not the plugin
and i am getting Error on the printed recipt _addon_items Array

What should i do to get the addon of items to be printed?
Its seems that the part of the code below doesn’t get the addon into the Araay.

<?php $meta = array_map(function ($meta, $key) {
			$result = '<tr>';
			$result .= '<td>' . $key . '</td>';
			$result .= '<td>' . $meta . '</td>';
			$result .= '</tr>';
			return $result;
		}, $meta, array_keys($meta));
		echo implode(PHP_EOL, $meta);
		?>

the code is from details-html.php template.

i really need help here i must finish my project

Thanks