Pillar - Installing Theme Plugins
When you first install the theme you'll see a popup on your dashboard from the theme asking you to install a number of plugins.
Allow the theme to install these for you. The plugins which are installed are dependent of the theme, the images below are for illustrative purposes only.
TIP - You can install all plugins at the same time by checking the box at the top of the this list, see below for an example.
Once done (the process should take no more than a few minutes) You will see a confirmation notice similar to the image below.
Now you have the themes plugins installed, you can continue to the next stage of the setup and import the demo data without any issues.