Old notebooks do not load correctly

[AviMaayan]

https://maayanlab.cloud/biojupies/notebook/uJypTyoKV

original notebook link

https://nbviewer.org/urls/storage.googleapis.com/jupyter-notebook-generator/uJypTyoKV/Young%20vs%20Aging%20Analysis%20Notebook%20%7C%20BioJupies.ipynb

[u8sand]

I checked some of my old links in my biojupies account, they all seem to work but the oldest one I have is May 13, 2020. Honestly I'm not sure what's going on here, nothing related to this should have changed on the biojupies side of things, perhaps it could be a nbviewer bug?

Maybe @denis-torre could better understand what's going on here.