Not sure if this is a problem with Firefox's updated tracking protection or a pileup on the network, but...
When trying to login to Community, SkyLogin has been generating a 404 page for /idp/error-404.jsp.
Hitting the back button then retrying to login works normally. Weird stuff.
* Disclaimer: I am a HughesNet customer and not a HughesNet employee. All of my comments are my own and do not necessarily represent HughesNet in any way.