masif_site docker tutorial 4ZQk_A error

[seojin3007]

Downloading PDB structure '4ZQk'...
Desired structure doesn't exists
Empty
Traceback (most recent call last):
File "/masif/source//data_preparation/01-pdb_extract_and_triangulate.py", line 48, in
extractPDB(pdb_filename, out_filename1+".pdb", chain_ids1)
File "/masif/source/input_output/extractPDB.py", line 38, in extractPDB
model = Selection.unfold_entities(struct, "M")[0]
IndexError: list index out of range
4ZQk_A
Reading data from input ply surface files.
Traceback (most recent call last):
File "/masif/source//data_preparation/04-masif_precompute.py", line 74, in
input_feat[pid], rho[pid], theta[pid], mask[pid], neigh_indices[pid], iface_labels[pid], verts[pid] = read_data_from_surface(ply_file[pid], params)
File "/masif/source/masif_modules/read_data_from_surface.py", line 23, in read_data_from_surface
mesh = pymesh.load_mesh(ply_fn)
File "/usr/local/lib/python3.6/site-packages/pymesh/meshio.py", line 21, in load_mesh
raise IOError("File not found: {}".format(filename));
OSError: File not found: data_preparation/01-benchmark_surfaces//4ZQk_A.ply

I'm using docker to reproduce the tutorial results, but I keep on getting this error.
Can someone please help me through this?