Hi, any idea why I'm getting this syntax error when I try to initiate training on a build from the terminal? >>> mlagents-learn /config/ppo/Basic.yaml --env=basictest --run-id=firstRun File "<stdin>", line 1 SyntaxError: can't assign to operator I am running the command from the root of the project directory (master-ml-agents if you like), which is where all the cloned directories are (ml-agents, ml-agents-envs etc) including the config folder and including the executable, named basictest.x86_64, and the associated data folder. Before this command I'd ran python >>> from mlagents_envs.environment import UnityEnvironment >>> env = UnityEnvironment(file_name='basictest.x86_64') >>> env.reset() and that works in terms of producing a pop up window showing the basic environment. I am on Linux Ubuntu 18.04, Unity 2019.4.4f1. I created a pipenv with Python 3.6, cloned the ML-Agents repo and did pip install -e for ml-agents, ml-agents-envs and gym-unity (all 0.18.0 and tensorflow 2.2.0 was installed as dependency). I've tried using the full file path to the build from home drive instead of just build name. I've tried 'Basic' instead of 'basictest'. I've looked at the migration document outlining the config format changes and tried the script upgrade_config.py but it returns an identical yaml file so I think the format I have is up to date. I've tried taking the first line 'behavior:' out of Basic.yaml. Can't figure it out.