marob-
You’ll need to enable cURL in your php.ini on your local xampp setup. This will resolve this error.
While I understand your desire for everything in the world to be free, rating a plugin lower because it allows you to easily connect to a paid service is not very fair.
If we had been dishonest and tried to trick people in to installing it to “suck them in” to our paid service it would be one thing, but we clearly state in the description that it requires a DPD account to use and includes a link to the DPD service.
