I don't know how to visualize.

[TriBall3]

I want to visualize the arm movement during training, but I'm not sure how to visualize the mujoco environment. I've called the function: env.visualize(),but it doesn't works.
Can someone help me?
The program I'm running is this：

I changed the program here：

But the program reported an error

In addition, I also have a question about whether the example of meta-learning is very slow to train. I trained the SAC-Metaworld program for 4 days, but the final success rate is still 0。