A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate
in the Unity community.
I am using unity 2018.4.8 and vuforia 8.3.8, also getting the black screen, any help? thank
Can you teach me how to change the SDK to 21.1,i am using 22.3, how can i downgrade to 21.1?