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
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.
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).