After receiving the EDU license I tried using the EDU key instead of the trial key from your website on a working and modified Instant Tracking - Simple scene, but I cannot get the camera to work as it shows only a black background. Also gives the errorcode 1006 with underlying error 1000.
I also changed the app ID.
On Android v.9 - OnePlus 5T
I apologize for the late reply. Could you please provide the full text of the error messages, if possible? The error code seems to indicate an issue with the camera, but I'd like to confirm that.
A potential workaround is to change the camera resolution from Auto to something else and see if anything else works. You could also try to disable Camera2 and see if that has any effect.
Please let us know if this helped.