Its posible that there is a json malformed. My temporary fix is to edit the plugin file wp-content\plugins\sync-post-with-other-site\includes\sps_sync.class.php
Update the code in line 308 to
$metaValue = isset($meta_value) ? wp_slash( $meta_value ) : '';
update_post_meta( $post_id, $meta_key, $metaValue );
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This reply was modified 1 year ago by pienavs.
This can be resolve by editing the woocommerce plugin.
edit the file “/wp-content/plugins/woocommerce/includes/admin/meta-boxes/views/html-variation-admin.php” on line 115 replace the
echo esc_attr( $_stock );
to
echo esc_attr( number_format($_stock , 0, ‘.’, ”));
