Script doesn't import the Free Contents by default. You will need to import them manually, this gives you the freedom of choice and you can import only item you want.
To get started first you need to enter your Purchase Code in Settings > General > General at the bottom of page you will find a Purchase Code field. Enter your purchase code there and then Go to System > Gift Contents from the side bar menu and you should now see all the available items there.
Still getting error?
If you have entered your purchase code but still getting the error it could be because of the spaces in the purchase code or due to Cache. First make sure that there are no spaces in the purchase code field and then go to Settings > Advance and click Clear Cache and Optimize Application buttons.
How to find your purchase code
- Log into your Envato Market account.
- Hover the mouse over your username at the top of the screen.
- Click ‘Downloads’ from the drop-down menu.`
- Click ‘License certificate & purchase code’ (available as PDF or text file).
Reference: https://help.market.envato.com/hc/en-us/articles/202822600-Where-Is-My-Purchase-Code-