After set up follow your document here:https://najeebmedia.com/blog/woocommerce-2checkout-payment-gateway-setup-guide/
but the payment still not working, evertime when I click “place order” button, my site will popup window with “Unauthorized”.
In addition, I have some questions. The pro version I purchased is 8.0, so should I use URL like this “http://YOURSITE.com/?wc-api=WC_Gateway_NM_TwoCheckout”? The new version has a lower version number than the previous version, which makes it difficult to understand.