Solved
Camera issue
I'm using vuforia and unity(2022.3.16) together to do my final year project. when in play mode, the application works however, after i've built the app, installed it on an android phone and given camera access, the screen is black. I can see on the top right corner there's a button I added to the canvas so I'm pretty sure the issue is with the camera. Please help as I do not understand where I went wrong.

