I built an AR application with Unity and Vuforia a month ago. And the app run well for some days.
But after about a month,
when I open the app, only black screen appeared.(I didn't edit anything. I just have used the app.)
So, I tried the reason and I found it. After ARCore update of my devices, it is not working.
Vuforia Ground plane and new version of Android ARCore cause the problem.
How can I solve this problem? Please help me.