mechelastic -h is producing error

[kcbhamu]

Dear Developers,
Thanks for a nice code,
I have installed mechelastic using pip and I do not see any error or warning during installation.
But when I invoke, mechelastic -h, I am getting below error.
Could you please have a look and advice me any possible solutions?

I am using ubuntu-18.04.

Traceback (most recent call last):
File "/home/kcbhamu/anaconda3/bin/mechelastic", line 40, in
import mechelastic
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/mechelastic/init.py", line 37, in
from mechelastic.parsers import VaspOutcar
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/mechelastic/parsers/init.py", line 1, in
from .vaspparser import VaspOutcar
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/mechelastic/parsers/vaspparser.py", line 9, in
from ..core import ElasticProperties
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/mechelastic/core/init.py", line 5, in
from .isosurface import Isosurface
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/mechelastic/core/isosurface.py", line 4, in
from skimage import measure
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/skimage/init.py", line 158, in
from .util.dtype import *
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/skimage/util/init.py", line 7, in
from .arraycrop import crop
File "/home/kcbhamu/anaconda3/lib/python3.6/site-packages/skimage/util/arraycrop.py", line 8, in
from numpy.lib.arraypad import _validate_lengths
ImportError: cannot import name '_validate_lengths'