Infinite redirects on http://nbviewer.ipython.org/

[gitcnd]

Won't load anything:

# curl -i https://nbviewer.ipython.org/ -L
HTTP/2 301 
date: Mon, 22 Apr 2024 10:50:05 GMT
content-length: 0
location: https://nbviewer.ipython.org/
retry-after: 0
accept-ranges: bytes
via: 1.1 varnish
x-served-by: cache-sjc10036-SJC
x-cache: HIT
x-cache-hits: 0
x-timer: S1713783005.018870,VS0,VE0
strict-transport-security: max-age=300
alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=NlrAj283b4%2BoQaZeANVUltbYruBVIP0PiYVs5Bz7xUgiYBCHiyTd1p75zsIfnp1iJ12%2FXZWP0iJAmWME7Vaf5fzWOx2ig%2FirI6kcgb%2Bgg6r%2BE9rqj2zqQOnonCzj6j1hQJViNiNptIguSlNY0L6QLMocoQ%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 87850d054c29aab5-SJC

HTTP/2 301 
date: Mon, 22 Apr 2024 10:50:05 GMT
content-length: 0
location: https://nbviewer.ipython.org/
retry-after: 0
accept-ranges: bytes
via: 1.1 varnish
x-served-by: cache-sjc1000096-SJC
x-cache: HIT
x-cache-hits: 0
x-timer: S1713783005.029737,VS0,VE0
strict-transport-security: max-age=300
alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=mASfweSpqJUDfrdB%2FZM52NY%2BwLG15lNBCj7jsF3w3Bi4OlmVG4D0FmhXQgc7QQ3D44v6QpbSgWGZzOULcDwuAtfAR2E5ebJTrP%2FH%2BpEn%2F54zxCSZ0M0YWE4Z4yDWHqFZP1%2F5nAZQah4L7KJ1zTN54qmrWw%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 87850d056c43aab5-SJC

HTTP/2 301 
date: Mon, 22 Apr 2024 10:50:05 GMT
content-length: 0
location: https://nbviewer.ipython.org/
retry-after: 0
accept-ranges: bytes
via: 1.1 varnish
x-served-by: cache-sjc10072-SJC
x-cache: HIT
x-cache-hits: 0
x-timer: S1713783005.040583,VS0,VE0
strict-transport-security: max-age=300
alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=hyyutTXT24o1QNBJ%2FCiX2Xsf%2FyRuV2yeGCXYZ3Asyih%2FPJlafMSaPnT5LH5Fuge10SXS3IjDvKYUcGdc6T7q3eZ5GO7%2B7bvBftq0skV%2B0nK4cecwRgkecIXupngHh%2BauMceDab1JVbSMxZFcWV36SayY0Q%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 87850d057c52aab5-SJC

HTTP/2 301 
date: Mon, 22 Apr 2024 10:50:05 GMT
content-length: 0
location: https://nbviewer.ipython.org/
retry-after: 0
accept-ranges: bytes
via: 1.1 varnish
x-served-by: cache-sjc1000121-SJC
x-cache: HIT
x-cache-hits: 0
x-timer: S1713783005.050465,VS0,VE0
strict-transport-security: max-age=300
alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=lZVe70QT92bzoLUULXWaoOsc54vs%2FWlqioT%2FdUQc0LzA2qQnW9ky%2FPd2TrtR7oIznaMK9jokOXidhGhxcweVNb2IT9HFmHD%2FPqCeesWYG5BjXBES1T5iibgn0EM8aSWu6Gxm5d4qmpa%2BPjU%2FNVf1PoKaAQ%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 87850d058c64aab5-SJC

HTTP/2 301 
date: Mon, 22 Apr 2024 10:50:05 GMT
content-length: 0
location: https://nbviewer.ipython.org/
retry-after: 0
accept-ranges: bytes
via: 1.1 varnish
x-served-by: cache-sjc10048-SJC
x-cache: HIT
x-cache-hits: 0
x-timer: S1713783005.061156,VS0,VE0
strict-transport-security: max-age=300
alt-svc: h3=":443"; ma=86400
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=sJvTOPnJsnkaLuzZgsPHhi2HbU9j1trsf9IxKuHl5gxTG8MynmzH8ttX6URhTqusWYXPC6RArMBP6q4rDd3rekSC6EIHf079getRxkJWpc9LRYmG2%2FtZP29QhAgI89FtqtbCgo%2Bi2PwCHVV21qsNi5qg2g%3D%3D"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 87850d059c6caab5-SJC

[Carreau]

I'm opened an issue with the Jupyter executive council.