I am using Magento2.2.0 and I have enabled Payments Standard(Accept credit card and PayPal payments securely) and set up paypal email , API username , API password, API Signature etc.
Now on frontend when I am placing an order with PayPal standard, it is being redirected to PayPal page and if I complete the full Payment Process it is working fine.
But If I cancelled the payment, it is redirected to Shopping Cart Page with the message "Express Checkout has been canceled".
Now my question is I have set up PayPal Standard but why it is giving error "Express Checkout has been canceled".