Please install the app via Shopify App Store.
In order to use our awesome app please disable “Prevent Cross-Site Tracking” or use another browser. That technology is giving us the ability to embed our app within your Shopify admin panel.
Here are some guidelines on how to do it:
Google Chrome: https://support.google.com/chrome/answer/2790761?co=GENIE.Platform%3DDesktop&hl=en