Install ionCube LoaderionCube Loader® is a PHP extension that allows decoding and encoding of WHMCS files. Before you install or upgrade your self-hosted WHMCS installation, make sure your system uses the correct version.
ionCube Fatal Decoding ErrorsTroubleshoot and resolve Fatal error: The file was encoded by... errors.
ionCube Loader Site ErrorsTroubleshoot and resolve Site error: the ionCube PHP Loader needs to be installed. errors.