i cannot load this scheme :
(ENVcondamujoco) lukas@lucasFr:~/anaconda3/envs/ENVcondamujoco/mujoco-py-master/mujoco-py$ python testeMujoco.py
Traceback (most recent call last):
File "testeMujoco.py", line 5, in <module>
model = load_model_from_path("cartpole.xml")
File "mujoco_py/cymj.pyx", line 131, in mujoco_py.cymj.load_model_from_path
raise Exception('Failed to load XML file: %s. mj_loadXML error: %s' % (path, errstr,))
Exception: Failed to load XML file: cartpole.xml. mj_loadXML error: b"XML Error: Schema violation: unrecognized attribute: 'frictional'\n\nElement 'joint', line 28, column 9\n"