Check Payment Gateway Configuration
- Ensure that API keys and credentials are correctly entered in your admin settings.
- Verify that the gateway is in live mode and not test mode if your store is live.
Verify SSL Certificate
- Make sure your website has a valid SSL certificate. Some gateways block unsecured transactions.
Check Transaction Logs
- Review transaction logs to identify if the issue is with your system or the gateway server.
Update Gateway Plugins or APIs
- Outdated gateway integrations can cause 400/500 errors. Update all related plugins or dependencies.
Contact Support
- If all configurations are correct but errors persist, contact your payment provider’s technical support for resolution.
Prevent Future Errors
- Schedule regular payment system testing.
- Enable error alerts for quick action on failed transactions.
