calling package to hub triggers the following error

gistfile1.txt

ℹ This function will save, evaluate, generate a video of your agent,
create a model card and push everything to the hub. It might take up to 1min.
This is a work in progress: if you encounter a bug, please open an issue.
/usr/local/lib/python3.7/dist-packages/stable_baselines3/common/evaluation.py:69: UserWarning: Evaluation environment is not wrapped with a ``Monitor`` wrapper. This may result in reporting modified episode lengths and rewards, if other wrappers happen to modify these. Consider wrapping environment first with ``Monitor`` wrapper.
  UserWarning,
---------------------------------------------------------------------------
NoSuchDisplayException                    Traceback (most recent call last)
<ipython-input-5-a05b2900be06> in <module>()
     28                eval_env=eval_env, # Evaluation Environment
     29                repo_id=repo_id, # id of the model repository from the Hugging Face Hub (repo_id = {organization}/{repo_name} for instance ThomasSimonini/ppo-LunarLander-v2
---> 30                commit_message=commit_message)
     31 
     32 # Note: if after running the package_to_hub function and it gives an issue of rebasing, please run the following code

15 frames
/usr/local/lib/python3.7/dist-packages/huggingface_sb3/push_to_hub.py in package_to_hub(model, model_name, model_architecture, env_id, eval_env, repo_id, commit_message, is_deterministic, n_eval_episodes, token, video_length, logs)
    373 
    374         # Step 4: Generate a video
--> 375         _generate_replay(model, replay_env, video_length, is_deterministic, tmpdirname)
    376 
    377         # Step 5: Generate the model card

/usr/local/lib/python3.7/dist-packages/huggingface_sb3/push_to_hub.py in _generate_replay(model, eval_env, video_length, is_deterministic, local_path)
    134         )
    135 
--> 136         obs = env.reset()
    137         lstm_states = None
    138         episode_starts = np.ones((env.num_envs,), dtype=bool)

/usr/local/lib/python3.7/dist-packages/stable_baselines3/common/vec_env/vec_video_recorder.py in reset(self)
     66     def reset(self) -> VecEnvObs:
     67         obs = self.venv.reset()
---> 68         self.start_video_recorder()
     69         return obs
     70 

/usr/local/lib/python3.7/dist-packages/stable_baselines3/common/vec_env/vec_video_recorder.py in start_video_recorder(self)
     78         )
     79 
---> 80         self.video_recorder.capture_frame()
     81         self.recorded_frames = 1
     82         self.recording = True

/usr/local/lib/python3.7/dist-packages/gym/wrappers/monitoring/video_recorder.py in capture_frame(self)
    130 
    131         render_mode = "ansi" if self.ansi_mode else "rgb_array"
--> 132         frame = self.env.render(mode=render_mode)
    133 
    134         if frame is None:

/usr/local/lib/python3.7/dist-packages/stable_baselines3/common/vec_env/dummy_vec_env.py in render(self, mode)
     85         """
     86         if self.num_envs == 1:
---> 87             return self.envs[0].render(mode=mode)
     88         else:
     89             return super().render(mode=mode)

/usr/local/lib/python3.7/dist-packages/gym/core.py in render(self, mode, **kwargs)
    293 
    294     def render(self, mode="human", **kwargs):
--> 295         return self.env.render(mode, **kwargs)
    296 
    297     def close(self):

/usr/local/lib/python3.7/dist-packages/gym/envs/box2d/lunar_lander.py in render(self, mode)
    386 
    387     def render(self, mode="human"):
--> 388         from gym.envs.classic_control import rendering
    389 
    390         if self.viewer is None:

/usr/local/lib/python3.7/dist-packages/gym/envs/classic_control/rendering.py in <module>()
     25 
     26 try:
---> 27     from pyglet.gl import *
     28 except ImportError as e:
     29     raise ImportError(

/usr/local/lib/python3.7/dist-packages/pyglet/gl/__init__.py in <module>()
    242     # trickery is for circular import
    243     _pyglet.gl = _sys.modules[__name__]
--> 244     import pyglet.window

/usr/local/lib/python3.7/dist-packages/pyglet/window/__init__.py in <module>()
   1889 if not _is_pyglet_doc_run:
   1890     pyglet.window = sys.modules[__name__]
-> 1891     gl._create_shadow_window()

/usr/local/lib/python3.7/dist-packages/pyglet/gl/__init__.py in _create_shadow_window()
    218 
    219     from pyglet.window import Window
--> 220     _shadow_window = Window(width=1, height=1, visible=False)
    221     _shadow_window.switch_to()
    222 

/usr/local/lib/python3.7/dist-packages/pyglet/window/xlib/__init__.py in __init__(self, *args, **kwargs)
    169                     self._event_handlers[message] = func
    170 
--> 171         super(XlibWindow, self).__init__(*args, **kwargs)
    172 
    173         global _can_detect_autorepeat

/usr/local/lib/python3.7/dist-packages/pyglet/window/__init__.py in __init__(self, width, height, caption, resizable, style, fullscreen, visible, vsync, file_drops, display, screen, config, context, mode)
    571 
    572         if not display:
--> 573             display = pyglet.canvas.get_display()
    574 
    575         if not screen:

/usr/local/lib/python3.7/dist-packages/pyglet/canvas/__init__.py in get_display()
     92 
     93     # Otherwise, create a new display and return it.
---> 94     return Display()
     95 
     96 

/usr/local/lib/python3.7/dist-packages/pyglet/canvas/xlib.py in __init__(self, name, x_screen)
    121         self._display = xlib.XOpenDisplay(name)
    122         if not self._display:
--> 123             raise NoSuchDisplayException('Cannot connect to "%s"' % name)
    124 
    125         screen_count = xlib.XScreenCount(self._display)

NoSuchDisplayException: Cannot connect to "None"