General errors can occur in many places throughout WHMCS, and can be due to many different problems. However, fixing them is often simple.
The first step to using WHMCS is installing it on your server. WHMCS includes an easy browser installation tool to suit most users' needs.
When you install WHMCS on a server, make sure to watch for errors both during and after the installation process.
Make sure to check for any problems both during and immediately after the upgrade process.
If you want more configuration options than browser-based installation offers, you can install and upgrade WHMCS on the command line.
For successful installation, updates, and operation, your system must meet the minimum system requirements for your WHMCS version.
You can check for updates and apply them directly in the Admin Area.