I believe that https://projects.theforeman.org/ over IPv6 isn’t working. The site appears to be working over IPv4 however.
$ curl --verbose https://projects.theforeman.org * Rebuilt URL to: https://projects.theforeman.org/ * Trying 2001:bc8:47a8:f18::1... ... curl: (35) getpeername() failed with errno 22: Invalid argument
Forcing IPv4 works in curl:
$ curl -4 --verbose https://projects.theforeman.org * Rebuilt URL to: https://projects.theforeman.org/ * Trying 126.96.36.199... ... > GET / HTTP/1.1 > Host: projects.theforeman.org
Since an IPv6 address is normally used before the IPv4 address, the site is broken for me unless I can figure out how to get Chrome to use IPv4 only.