If you do not know the cause of a problem, troubleshooting helps you learn more about it. We recommend trying basic steps to gather information before you contact WHMCS support.
Error pages display friendly, styled messages about error conditions. All of WHMCS's error pages on self-hosted WHMCS installations are fully customizable for your needs.
WHMCS logs all activity, admin logins, gateway communications, sent and received email communications, and domain lookups. You can also configure the system to log errors and warnings.