why is the dqn example not running?

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The python version I'm using is 3.8,and the paddle version is 2.5.0,The error message is as follows:

[12-16 07:04:52 MainThread @logger.py:242] Argv: D:\Source\study\python\paddle\examples\tutorials\lesson3\dqn\train.py
[12-16 07:04:53 MainThread @utils.py:79] paddlepaddle version: 2.5.0.
Traceback (most recent call last):
File "D:\Source\study\python\paddle\examples\tutorials\lesson3\dqn\train.py", line 30, in
from model import Model
File "D:\Source\study\python\paddle\examples\tutorials\lesson3\dqn\model.py", line 18, in
from parl import layers # Encapsulates the API of paddle.fluid.layers
ImportError: cannot import name 'layers' from 'parl' (D:\Source\study\python\paddle\parl_init_.py)

Process finished with exit code 1

Could you provide a requirements.txt file with the latest parl framework and dependencies that will work with the example? Thank you!