Common sandbox configuration mistakes in CyberSource include using incorrect API credentials, wrong endpoint URLs, or outdated SDK versions. Another frequent issue is mixing production and sandbox data, which can cause authentication or transaction errors. To fix these, double check that sandbox credentials and endpoints are correctly applied in your project. Ensure the SDK and dependencies are up to date. Always test transactions in the sandbox environment first and avoid using real payment data, which prevents errors and ensures smooth integration before going live.
