LVE Manager UI in WHM/cPanel looks different than usual, it doesn't contain many of our features and proper formatting:
There are several things that might go wrong. Yet for the most part, the culprit is the missing lvemanager package or the missing CloudLinux license.
This issue has a solution that has already been developed by the CloudLinux Team. For the original details, you can view this through the following link for the original solution: