Cannot run the example

[xyang2013]

Context:

1. Install gym-sokoban from the source:
   python install -e .

2. Running the following code in a Jupyter notebook:

import gym 
import gym_sokoban

env = gym.make('Sokoban-v0')
#env.reset()

env.render(mode='human')

action = env.action_space.sample()
observation, reward, done, info = env.step(action)

3. Error:

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
Cell In[9], line 1
----> 1 env = gym.make('Sokoban-v0')
      2 #env.reset()
      4 env.render(mode='human')

File ~/miniconda3/envs/llama3/lib/python3.9/site-packages/gym/envs/registration.py:640, in make(id, max_episode_steps, autoreset, apply_api_compatibility, disable_env_checker, **kwargs)
    637     render_mode = None
    639 try:
--> 640     env = env_creator(**_kwargs)
    641 except TypeError as e:
    642     if (
    643         str(e).find("got an unexpected keyword argument 'render_mode'") >= 0
    644         and apply_human_rendering
    645     ):

File ~/miniconda3/envs/llama3/lib/python3.9/site-packages/gym_sokoban/envs/sokoban_env_variations.py:14, in __init__(self)

File ~/miniconda3/envs/llama3/lib/python3.9/site-packages/gym_sokoban/envs/sokoban_env.py:48, in SokobanEnv.__init__(self, dim_room, max_steps, num_boxes, num_gen_steps, reset)
     44 self.observation_space = Box(low=0, high=255, shape=(screen_height, screen_width, 3), dtype=np.uint8)
     46 if reset:
     47     # Initialize Room
---> 48     _ = self.reset()
...
    408 else:
    409     # Writing: check that the directory to write to does exist
    410     dn = os.path.dirname(fn)

FileNotFoundError: No such file: '/home/xy/miniconda3/envs/llama3/lib/python3.9/site-packages/gym_sokoban/envs/surface/box.png'
Output is truncated. View as a scrollable element or open in a text editor. Adjust cell output settings...

4. After checking the site-package folder, I found there is no gym_sokoban folder. There is only an egg-link file:

gym-sokoban.egg-link

I am not sure how I can fix the above issue and get it running.