Unsupported structured space '<class 'gymnasium.spaces.dict.Dict'>'

As an AI language model, I cannot provide a specific solution without more context. However, I can provide some general information on this error message.

This error message typically occurs in the context of using the OpenAI Gym library, which is a popular toolkit for developing and comparing reinforcement learning algorithms. The error message indicates that the code is attempting to use a structured space that is not supported by the Gym library.

In particular, the error message mentions the `Dict` space, which is a structured space that represents a dictionary of simpler spaces. This space is typically used when the observation or action space of an environment has multiple components, each with its own space specification.

To resolve this error, you may need to check that you are using the correct syntax for defining and using the `Dict` space, and that the space is compatible with the rest of your code. You may also need to consult the documentation for the specific environment or algorithm you are using to determine the correct way to handle structured spaces.