Bug? Fatal error: Uncaught ErrorException

When I save below code everything is still okay:

add_filter(‘rp_wcec_custom_macros’, ‘yw_wcec_add_domain_name_macro’, 10, 5);

function yw_wcec_add_domain_name_macro ($custom_macros, $args) {

global $woocommerce, $post;
$order = new WC_Order($post->ID);
$order_id = $order->get_order_number();

$domain = get_post_meta($order_id, ‘domain_name’, true);
$domain_link = get_post_meta($order_id, ‘domain_link’, true);
$domain_ssl = get_post_meta($order_id, ‘domain_ssl’, true);

if ($domain_link == ‘Ja’) {

if ($domain_ssl == ‘Ja’) {
$domain_name = ‘https://’ . $domain;
} else {
$domain_name = ‘https://’ . $domain;
}

} else {

$domain_name = ‘https://’ . pathinfo($domain, PATHINFO_FILENAME) . ‘yoowoo.nl’;

}

return array(‘domain_name’ => array(‘value’ => $domain_name));

}

but when I activate the (multi site) option to (de)activate the code induvidually for each site I get this error:

Fatal error: Uncaught ErrorException: Trying to set invalid property on Snippets class: sharing in /home/users/******/yoowoo.nl/wp-content/plugins/code-snippets/php/class-snippet.php:131 Stack trace: #0 /home/users/******/yoowoo.nl/wp-content/plugins/code-snippets/php/admin-menus/class-edit-menu.php(198): Snippet->__set(‘sharing’, ‘on’) #1 /home/users/******/yoowoo.nl/wp-content/plugins/code-snippets/php/admin-menus/class-edit-menu.php(97): Code_Snippets_Edit_Menu->save_posted_snippet() #2 /home/users/******/yoowoo.nl/wp-content/plugins/code-snippets/php/admin-menus/class-edit-menu.php(83): Code_Snippets_Edit_Menu->process_actions() #3 /home/users/******/yoowoo.nl/wp-includes/class-wp-hook.php(298): Code_Snippets_Edit_Menu->load(”) #4 /home/users/******/yoowoo.nl/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(”, Array) #5 /home/users/******/yoowoo.nl/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #6 /home/users/******/yoowoo.nl/wp-admin/admin.php(212): do_action(‘load-snippets_p…’) in /home/users/******/yoowoo.nl/wp-content/plugins/code-snippets/php/class-snippet.php on line 131

Any ideas why this suddenly happens? In the past this never has been an issue…