Environment `GazeboMarsLsdForce-Lidar` doesn't exist.

[188CHENJEFF]

Hello, I am very sorry to disturb you,I tried to run the pretrained model, but the following error occurred. I would like to ask you how to solve this bug：

  File "stable-SAC_test.py", line 65, in <module>
    env = gym.make('GazeboMarsLsdForce-Lidar-v0')
gym.error.NameNotFound: Environment `GazeboMarsLsdForce-Lidar` doesn't exist. Did you mean: `GazeboMarsLsd`?

If I change the environment name, a new error will be reported:

env = gym.make('GazeboMarsLsd-v0')
  File "/home/chenjeff/Downloads/yes/envs/detectron2/lib/python3.8/site-packages/gym/envs/registration.py", line 676, in make
    return registry.make(id, **kwargs)
  File "/home/chenjeff/Downloads/yes/envs/detectron2/lib/python3.8/site-packages/gym/envs/registration.py", line 520, in make
    return spec.make(**kwargs)
  File "/home/chenjeff/Downloads/yes/envs/detectron2/lib/python3.8/site-packages/gym/envs/registration.py", line 139, in make
    cls = load(self.entry_point)
  File "/home/chenjeff/Downloads/yes/envs/detectron2/lib/python3.8/site-packages/gym/envs/registration.py", line 55, in load
    mod = importlib.import_module(mod_name)
  File "/home/chenjeff/Downloads/yes/envs/detectron2/lib/python3.8/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 843, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/home/chenjeff/Active-Suspension/gym-gazebo/gym_gazebo/envs/lsd_rover/__init__.py", line 1, in <module>
    from gym_gazebo.envs.lsd_rover.lsd_rover_active_suspension import LsdEnv
  File "/home/chenjeff/Active-Suspension/gym-gazebo/gym_gazebo/envs/lsd_rover/lsd_rover_active_suspension.py", line 19, in <module>
    import tf2_geometry_msgs
  File "/opt/ros/noetic/lib/python3/dist-packages/tf2_geometry_msgs/__init__.py", line 1, in <module>
    from .tf2_geometry_msgs import *
  File "/opt/ros/noetic/lib/python3/dist-packages/tf2_geometry_msgs/tf2_geometry_msgs.py", line 31, in <module>
    import PyKDL
ModuleNotFoundError: No module named 'PyKDL'