Cannot start donkeycar sim. Exception: Could not connect to server.

[innovationty]

Here is the information for the exception. I tried to follow the video https://www.youtube.com/watch?v=wqQMmHVT8qw, but it didn't work. How could I solve the problem? I really appreciate to get answers.

starting DonkeyGym env Setting default: start_delay 5.0 Setting default: max_cte 8.0 Setting default: cam_resolution (120, 160, 3) Setting default: log_level 20 Setting default: steer_limit 1.0 Setting default: throttle_min 0.0 Setting default: throttle_max 1.0 donkey subprocess started INFO:gym_donkeycar.core.client:connecting to 127.0.0.1:9091 Traceback (most recent call last): File "/home/polo/projects/gym-donkeycar/gym_donkeycar/core/client.py", line 45, in connect self.s.connect((self.host, self.port)) ConnectionRefusedError: [Errno 111] Connection refused

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/home/polo/mysim/manage.py", line 1142, in drive(cfg, model_path=args['--model'], use_joystick=args['--js'], File "/home/polo/mysim/manage.py", line 92, in drive add_simulator(V, cfg) File "/home/polo/mysim/manage.py", line 765, in add_simulator gym = DonkeyGymEnv(cfg.DONKEY_SIM_PATH, host=cfg.SIM_HOST, env_name=cfg.DONKEY_GYM_ENV_NAME, conf=cfg.GYM_CONF, ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/polo/miniconda3/envs/donkey/lib/python3.11/site-packages/donkeycar/parts/dgym.py", line 28, in init self.env = gym.make(env_name, conf=conf) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/polo/miniconda3/envs/donkey/lib/python3.11/site-packages/gym/envs/registration.py", line 676, in make return registry.make(id, kwargs) ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/polo/miniconda3/envs/donkey/lib/python3.11/site-packages/gym/envs/registration.py", line 520, in make return spec.make(kwargs) ^^^^^^^^^^^^^^^^^^^ File "/home/polo/miniconda3/envs/donkey/lib/python3.11/site-packages/gym/envs/registration.py", line 140, in make env = cls(*_kwargs) ^^^^^^^^^^^^^^ File "/home/polo/projects/gym-donkeycar/gym_donkeycar/envs/donkey_env.py", line 179, in init super().init(level="generated_track", args, *kwargs) File "/home/polo/projects/gym-donkeycar/gym_donkeycar/envs/donkey_env.py", line 91, in init self.viewer = DonkeyUnitySimContoller(conf=conf) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/polo/projects/gym-donkeycar/gym_donkeycar/envs/donkey_sim.py", line 71, in init self.client = SimClient(self.address, self.handler) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/home/polo/projects/gym-donkeycar/gym_donkeycar/core/sim_client.py", line 28, in init super().init(address) File "/home/polo/projects/gym-donkeycar/gym_donkeycar/core/client.py", line 37, in init self.connect() File "/home/polo/projects/gym-donkeycar/gym_donkeycar/core/client.py", line 47, in connect raise ( Exception: Could not connect to server. Is it running? If you specified 'remote', then you must start it manually. closing donkey sim subprocess