reduced_deformable_cube.py doesn't work

[yuki-sato109]

I executed the following code, but it didn't work as expected. The code is from GitHub. What could be the cause?
`
import pybullet as p
from time import sleep
import pybullet_data

physicsClient = p.connect(p.GUI)

p.setAdditionalSearchPath(pybullet_data.getDataPath())

p.resetSimulation(p.RESET_USE_REDUCED_DEFORMABLE_WORLD)
p.resetDebugVisualizerCamera(4,-40,-30,[0, 0, 0])
p.setGravity(0, 0, -10)

tex = p.loadTexture("uvmap.png")
planeId = p.loadURDF("plane.urdf", [0,0,-2])

boxId = p.loadURDF("cube.urdf", [1,1,5],useMaximalCoordinates = True)
cube = p.loadURDF("reduced_cube/reduced_cube.urdf", [1,1,1])

p.changeVisualShape(cube, -1, rgbaColor=[1,1,1,1], textureUniqueId=tex, flags=0)
p.setPhysicsEngineParameter(sparseSdfVoxelSize=0.25)
p.setRealTimeSimulation(0)

while p.isConnected():
p.stepSimulation()
p.getCameraImage(320,200)
p.setGravity(0,0,-10)
`

The error is shown below the code.

`
b3Printf: URDF file 'reduced_cube/reduced_cube.urdf' not found

Traceback (most recent call last):
File "/home/ericlab/デスクトップ/sato/cloth-penetration-example/reduced_cube.py", line 19, in
cube = p.loadURDF("reduced_cube/reduced_cube.urdf", [1,1,1])
pybullet.error: Cannot load URDF file.
`