ERROR in MarketPress/PayPal URL

I'm using MarketPress for a client site and was looking at the information for PayPal integration.

On the PayPal Express Checkout set up page, there is an error in the "Instructions" URL.

The link goes to:
https://www.x.com/developers/paypal/documentation-tools/express-checkout/integration-guide/ECAPICredentials

but it should go to:
https://www.paypal.com/developers/paypal/documentation-tools/express-checkout/integration-guide/ECAPICredentials

Note that the URL listed in the original is x.com, not paypal.com.