How to render the platform?

[chengliu-LR]

Hi Craig, I am trying to use env.render(mode="rgb_array") to see how the environment looks like, but the popped-out pygame window seems not rendering the environment properly (nothing but a black window). I am using macOS Catalina and Pygame 2.0.0.dev12, can you tell me the possible methods to render the environment? Thank you! :)