Beautiful Names error

im gettin this erro when installing beautiful names from command line

python pluginInstaller.py remove --pluginName beautifulNames
python: can’t open file ‘pluginInstaller.py’: [Errno 2] No such file or directory

You need to upgrade CyberPanel (v1.7.3 onwards supports plugins)

im using
Latest Version
1.7
Latest Build
3

Did you do

cd /usr/local/CyberCP/pluginInstaller