Augmented Reality for UE4

Good evening I would have a problem to test whether to buy the commercial version of the plugin i bought the personal version but i would have the problem that the sample project works on the mobile only if i do the operation from the editor () the project on any android device works in ETC2.
When instead of the editor create an apk file to install then on the android device, the file is generated correctly but when I start the application on the device the background remains white and nothing is seen. As in the attached picture. Thanks For Help…