Unzip the download and drag the lb-businessapp folder on your server
Make changes in the configuration files if you want
Ensure the script in your server.cfg :ensure lb-businessapp
Restart your FiveM Server and test the system
There is a sql file which should be automatically added to your servers database. Please check if your jobs table has a motd column. If not, import the sql.sql file manually to your servers database.
Make sure you have setted the config correctly that you can open the menu.