Issue launching humanoid_running_vr_follow.py

[EnricoBeltramo]

When I launch humanoid_running_vr_follow.py I have follow error:

File "humanoid_running_vr_follow.py", line 17, in
plane, human = p.loadMJCF("mjcf/humanoid_symmetric.xml",flags = p.URDF_USE_SELF_COLLISION_EXCLUDE_ALL_PARENTS)
ValueError: not enough values to unpack (expected 2, got 1)

instead humanoid_running.py works well.
Do I miss something?

Thank