Please follow the steps below:
Step 1:: Install a Joomla Site (Eg: A new White Joomla Site).
Step 2:: Download the Plazart Framework from GitHub by clicking on the Download Zip button.
Step 3:: Log in your back-end and go to "Extensions/Extension Manager" and do the following images:
Step 4:: Go to your site in the front end and check it. Here is the result: