Fix WooCommerce Checkout Error

I'm experiencing an error on my WordPress site at checkout: "There was an error processing your order. Please check for any charges in your payment method and review your order history before placing the order again." I have the latest version of WooCommerce and only the Offline Credit Card Processing by WP Lab plugin installed.

Skills and Experience:
- Proficiency in WooCommerce
- Experience with WordPress troubleshooting
- Familiarity with payment processing plugins
- Problem-solving skills to diagnose and fix checkout errors

Please provide a solution to resolve this issue.