[ad_1]
If you get this warning:
“Sorry, when creating new custom fields only letters are allowed (so no white spaces, numbers or any other character are allowed).”
you may edit “wp-content/plugins/woo-product-feed-pro/js/woosea_field_mapping.js” file
find this:var re = /^[a-zA-Zа-яА-Я_-]*$/;
replace with:/.*/;
A message to developer of the plugin: thank you.