gymnasium.error.NameNotFound: Environment BreakoutNoFrameskip doesn't exist.

[bryanwwy]

Problem Description

An error is reported when the file is runppo_atari.py
Run the ppo.py file correctly
error：gymnasium.error.NameNotFound: Environment BreakoutNoFrameskip doesn't exist.

[vwxyzjn]

Did you do poetry install -E atari?

[bryanwwy]

Hello, I installed it.And after entering the code, it can be run and there is web page generation.(code : poetry run python cleanrl/ppo.py tensorboard --logdir runs)

[ginreedcho]

I encountered the same issue and was unable to resolve it by “poetry install -E atari”

[Dottellini]

I have the same error when trying to start a custom gymnasium environment. It is registered correctly with gymnasium (when printing the registry), but when i try running with CleanRL i get this issue.
May it be related to this? Farama-Foundation/Gymnasium#222