"400 : Bad Request server certificate verification failed" on nbviewer.org #1076
Description
Recently the certificate on our servers was renewed, apparently using another root CA (HARICA TLS RSA Root CA 2021). The viewer on nbviewer.org does not seem to like this (e.g. when trying to display the notebook from https://research.edm.uhasselt.be/~jori/grale2/_static/gridtests.ipynb), showing the error
400 : Bad Request
server certificate verification failed. CAfile: none CRLfile: none
There doesn't seem to be a problem loading the URL using Chrome or Firefox, or using curl.