Action space Discrete is not supported for DQN

RLlib
1

How severe does this issue affect your experience of using Ray?

  • Medium: It contributes to significant difficulty in completing my task, but I can work around it.

Hello everyone,
I learning RLlib, and I am trying to replicate the “tutorial” contained in the book “learning ray flexible distributed python for Machine Learning” concerning a maze environment for a multi-agent application.

Before starting the training step, I get the following error message: UnsupportedSpaceException: Action space Discrete(4) is not supported for DQN.

But DQN should support discrete spaces.

Can anyone help me?

Thanks in advance.