Unity version?

[kuolunwang]

I have question about Unity version, because I use this repo and install the new version Unity 2020.3.25f1 run readme train with vision network with unity, the Unity screen can render doorgym environment as below picture.

However the terminal always frozen and didn't any response like below picture.

Is the version of Unity wrong? or some problem?
I use Ubuntu 20.04 and my driver version is nvidia-460.