Troubleshooting InstallationWhen you install WHMCS on a server, make sure to watch for errors both during and after the installation process.
Troubleshooting LicensingYou might see license-related errors if you cannot connect to the WHMCS license server or there is a misconfiguration in your system.
cURL Couldn't Connect to Host ErrorsTroubleshoot and resolve Curl Error - Couldn't connect to host (7) errors.
cURL Couldn't Resolve Host ErrorsTroubleshoot and resolve Curl Error - Couldn't resolve host (6) errors.
License InformationYou can view license information, force license updates, and change your license key from within the WHMCS Admin Area.
License Key Required ErrorsTroubleshoot and resolve A license key is required. errors during installation.
Outdated root CA BundlesTroubleshoot and resolve You are currently accessing the admin area using an insecure connection errors.
Software LicensingThe Software Licensing addon module allows you to license and sell your own web applications and implement remote license checking.
Force a License UpdateIn some circumstances, you must force WHMCS to perform a license update. For example, you may need to do this after purchasing a new addon module.
Move WHMCS to a New ServerWhen you move your WHMCS installation from one server to another, you may need to perform additional steps like updating your license.
Move WHMCS to a New SubdomainWhen you move your WHMCS installation from one subdomain to another on the same server, you may need to perform additional steps like updating your license.
Update the Recurring AmountRecalculate the Recurring Amount value for a service. You must do this after certain actions, like expiring a cPanel Licensing license.