The requirements are listed below. The module may work under different conditions, but has only been tested by our developers in these scenarios. This article assumes that your system, server and PHP installation meets the requirements of WHMCS itself. Their requirements can be found here https://docs.whmcs.com/System_Requirements
System Requirements
- Clear understanding of using WHMCS as well as uploading, installing and configuring addons and gateways
- PHP 5.6 or higher
- WHMCS 7.x (we do not support alpha, beta or release candidate builds)
- OpenSSL (or any SSL library) w/ TLS 1.1+ support
- Ioncube loader v10.1.x or higher
