Many servers seem to be down for players. It's a problem on Mojang's part and there's nothing we can do about it. Sorry for the inconvenience.
Not sure yet, have not been able to check or touch my computer. But a few other staff are having the exact same problem. As well as some other servers.
This video might help a little. This is my understanding of what is happening. It may be kind of loud, so turn your speakers down a bit.
As mentioned above, this is an issue on Mojang's end due to the session authentication servers being attacked, meaning people cannot join servers. However, with Noble Craft, if you have joined any time in the last several days, you should be able to log in, provided your account UUID and IP match. Otherwise, we cannot do anything more until the session servers are back up.