General Troubleshooting

General errors can occur in many places throughout WHMCS, and can be due to many different problems. However, fixing them is often simple.

Troubleshooting Authentication

Authentication issues may include inability to log in, unexpected logouts, or errors while using other authentication methods.

Troubleshooting Installation

When you install WHMCS on a server, make sure to watch for errors both during and after the installation process.

Troubleshooting Invoices

Issues with invoices and invoice generation can be due to many causes, some of which may not be obvious at first.

Troubleshooting Payments

Make sure to troubleshoot and resolve any issues with payment gateways, payments, currencies, or related features as soon as possible.