General errors can occur in many places throughout WHMCS, and can be due to many different problems. However, fixing them is often simple.
Authentication issues may include inability to log in, unexpected logouts, or errors while using other authentication methods.
We support many different ways to customize your WHMCS installation, all of which have their own troubleshooting needs.
When you sell domains, issues with domain availability checks, registration, or renewals can cause serious problems.
You might see license-related errors if you cannot connect to the WHMCS license server or there is a misconfiguration in your system.
If you experience problems with MarketConnect landing pages, promotions, or provisioning, it may be due to misconfigurations or other issues.
Make sure to troubleshoot and resolve any issues with payment gateways, payments, currencies, or related features as soon as possible.