Hey guys,
I also just ran into this problem. One thing I found is that ARCore seems to prefer square images. I had a rectangle image that would give me an arcoreimg score of 5. When I cropped it to a square, it gave me a score of 100. (Interestingly, the rectangle image is no issue for ARkit).
Unfortunately, after importing the square image, the build still failed with the “Failed to build augmented image database” error.
I wouldn’t mind trying the manual build process but where do the resulting files go?
Using 4.20 p5 and trying to create a project for both iOS and Android.
Thanks!
Serge