ValueError: ('Unknown space type for serialization, ', <class 'gymnasium.spaces.graph.Graph'>)

[FlynnDowey]

What happened + What you expected to happen

Created a custom environment with an observation space gymnasium.spaces.Graph, but Ray cannot serialize it when configuring the algorithm.

See the error printed to the console: error_report_console.txt

Versions / Dependencies

ray: 2.40.0
python: 3.12.5
gymnasium: 1.0.0

Reproduction script

See the code: bug_report_code.txt

Issue Severity

High: It blocks me from completing my task.