Progress bar (pymc 3.9) does not work with Voila-dashboard view

Hello,

I was trying to use pymc3 (3.9.2) with Voila (https://voila.readthedocs.io/en/stable/) and I cannot see the progress bar running in the Voila-dashboard view (it works fine with the classic notebook). All i see is a grey box:

But when i use pymc3 (3.7), which has the older version of progress bar, I can see the progress bar running just fine.

You can check it here:
https://mybinder.org/v2/gist/atharvahans1/68044ff6d1f093b7d1d788929231754d/master

How can I fix this?

Thanks,
Atharva