Minecraft earth ar mode does not start?

I play minecraft earth on the samsung galaxy a20e and when i start mincraft earth everything works but when i'm in the tutorial i have to go on an adventure but when i want to start it i stay on the screen

cherish and the animation goes on but it doesn't go on

You have to find a bright and flat spot on the floor, I also had problems and after some searching I found the spot on the floor where it fits