Why am I getting the error 'This type is not supported'?
If you get the error 'This type is not supported', you must be sending PayPal credentials external checkout. PayPal and PayPal Classic are different parts of PayPal services, and they are integrated differently on the side of PayDock.
To make this work, you will need to integrate PayPal Classic, and in your API request use type value 'PayPalClassic' and credentials for PayPal Classic.
If you still experience the issue, please contact us at firstname.lastname@example.org.