LVE Manager doesn't work and its interface is broken on WHM/cPanel server

Symptoms

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.

Ensure that lvemanager is installed
```
# rpm -q lvemanager
```
Check if lvemanager package is not corrupted and you have no duplicated packages:
```
# rpm -V lvemanager
# package-cleanup --dupes
```
Check and update the server license
If the lvemanager package is installed, check if your server is registered with a valid license:
```
# cldetect --check-license
OK
```
"OK" is the valid output; that means that the server is registered. If it's not, register one by following our guide. Once it's done, run the following commands:
```
# cldetect --update-license
# /usr/share/l.v.e-manager/install-lvemanager-plugin.py -u
```