Ensure that the latest CyberSource Java, PHP, or .NET SDK version is installed along with all required dependencies. Verify that your API credentials, authentication keys, and endpoint URLs are correct. Check for any firewall or network restrictions that could block API requests. Clearing old cache or temporary files and restarting the development environment can also help. Running tests in the sandbox environment allows safe debugging and helps identify configuration or connectivity issues, ensuring the SDK functions correctly in your application.
