How to resolve 'License Invalid' or licensing error(s) in whm ?
Step 1: first of all login on server as root user.
Step 2: Please run following cammand as root user
/etc/init.d/cpanel restart
If this cammand will not resolve your issue then follow step 3.
Step 3: now run following command on server to check license is active or expired.
/usr/local/cpanel/cpkeyclt
this cammand will refresh your license key. if this cammand show license expired that means you need to contact your license provider or server provider(if license is with server).