When adding account using Receiver for Android 3.9.1 and accessing StoreFront using NetScaler Gateway, setting defaults to StoreFront Web UI instead of showing list of apps in the Receiver app. It opens a webpage to sign into Receiver for Web. When changing type to XenApp Services or NetScaler Gateway, error "An error has occurred while connecting. Check your server address and data connection" is displayed.

This is a current design limitation of Receiver for Android when " Unified Experience" has been been enabled on the Store. To resolve this issue go to Store > Configure Unified Experience > Disable Unified experience.

This is enabled on all stores and it is a design behavior of StoreFront that Receiver for Android contacts the Default Web User Interface.