This error means that the central object you’re capturing or the environment that you’re trying to capture does not contain enough contrasting areas that can help the app analyze the space. There should be at least one contrast fragment inside the circle.
1 contrast area
2 non-contrasting area
Try moving the central circle (can be moved using your finger before capturing), moving the perspective (even slightly), adding contrast objects into the environment, or changing the whole environment.
On the contrast areas, the app will place blue points during capturing. The more of them there are – the more precisely the app analyzes the space.
The scene you are going to capture should be well illuminated and static (without any motion).