Augmented reality unity showing black screen android

Three reasons that you are seeing black screen in unity Augmented Reality (AR) application. I am using augmented reality application on Android that I developed on Unity Game-engine with AR foundation and ARCore plugin by Google. Later, I found that there are two settings you need to do in unity project. And also you should install Google play service for AR. So in total, three reasons that may be an issue. Please watch below video to know three reasons for unity AR black screen problem. All setting or solutions are clearly given in the video!