<section>
<p>API error code 10003 is a result of required parameters missing or being passed incorrectly in your integration. Refer to the API error code <a href="https://developer.paypal.com/api/nvp-soap/errors/#10003">10003 section of our NVP/SOAP documentation</a> for specific message content, causation, and solutions.</p></section>

Why did I get API error code 10003?

Errors/API Error Codes

API error code 10003 is a result of required parameters missing or being passed
incorrectly in your integration. Refer to the API error code 10003 section of...

Why did I get API error code 10003? | PayPal US

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Why did I get API error code 10003?

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