By default, the Instagram Feed Tool module is showing an error at the bottom of your site because it needs to be authorized.
To fix this, please go to the back end of your site, and click Site Settings under "Dashboard"
Scroll down to the Instagram Access Token option and click "How to get token?." On the page you are being redirected to, hit Generate Access Token button and then Authorize it. You'll be taken to a confirmation page, then you can copy the token to have a working Instagram widget.
Go back to the Site Settings page on your back end and paste the token in the Instagram Access Token field and save your changes.
On your home page, enter Design Studio and click the Instagram Feed Tool module to open its settings. Enter your Instagram Username in the provided field. You can also set up how many images to show and how many per row. Save and publish your changes to finally display your Instagram images on your site.