App functionality with the MicroG suite / aurora store

MicroG is an alternative implementation of the GMS library, and aurora store is an alternative frontend for the Google play store.
Aurora does not permit piracy - you can only download paid apps (like ireal) when signed into an account which has paid.
Despite this, downloading and opening the app on a microG phone gives a licensing error.
Can someone help with this?
Thanks in advance :)

The licensing error might relate to the Play store's license verification and checks during the first week after installing.
Aurora may have information about this.

Turns out it was microG's lack of licencing - they've implemented a licence checker so it works now :)