GNOME shell extensions site broken

[Phil Mitchell <philip mitchell gmail com>]

Mostly I am getting a 502 error, but sometimes I get a 504 error 
instead.  This is from several different computers on several different 
networks:

https://extensions.gnome.org/


 Proxy Error

The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request/GET / 
<https://extensions.gnome.org/>/.

Reason:*Error reading from remote server*

------------------------------------------------------------------------
Apache/2.2.15 (Red Hat) Server at extensions.gnome.org Port 443