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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 Domains

When you sell domains, issues with domain availability checks, registration, or renewals can cause serious problems.

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 Licensing

You might see license-related errors if you cannot connect to the WHMCS license server or there is a misconfiguration in your system.

Troubleshooting MarketConnect

If you experience problems with MarketConnect landing pages, promotions, or provisioning, it may be due to misconfigurations or other issues.

Troubleshooting Orders

If you experience problems with orders or fraud checks, it may be due to misconfigurations or other issues.

Troubleshooting Payments

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

Troubleshooting PHP

WHMCS runs on PHP code and requires several PHP extensions in order to function normally. If there is a problem with PHP on your server, you will experience problems in many areas of WHMCS.

Troubleshooting Products and Services

You may experience problems while configuring products for sale, during the purchase process, or when managing individual clients' purchased services.

Troubleshooting Server Issues

Some provisioning and server-related issues are due to misconfiguration in your WHMCS installation, while others may be due to networking issues or other server-side problems.

Troubleshooting SSL

You will see SSL-related errors if the SSL certificate for your WHMCS installation is missing, misconfigured, or out-of-date, or if there are connection issues.

Troubleshooting System Email

Problems with your system email can prevent you from sending email to clients or connecting to your mail provider.

Troubleshooting the Client Area

Issues in the Client Area or your online store can hurt customers' ability to purchase your products or access their purchased services.


Troubleshooting the Support System

Problems in the support ticket system and its related features can prevent email replies from importing properly and cause other disruptions.

Troubleshooting the System Cron

If the system cron configuration is incorrect or it encounters problems when running, you may see problems with automation throughout WHMCS.