Not down, he changed which chain he was on. Official chain open to change at a whim. You need to get a copy of the blockchain from a few days ago, then re-sync. Then all will be good, until it isn't.
Not the first time I've had to do a full resync (Wallet originally was on a Windows desktop, then found out the hard way a RPi Zero can't handle wallet duty, currently using an OrangePI PC for that task). Since then, I've had to resync a couple times... Reasons...
I have a copy of the 3042 chain from here:
https://m-core.org/bin/block-chain/Downloaded after the last update date listed on that page (but before today)...
Updated magi.conf to mirror the Trasma admin's advice using connect in lieu of add-node and switching off listen (see my previous post), deleted peers.dat, resynced. I have a single connection to I'm assuming Joe (if he runs .215) that is staying in sync with minerclaim and poolinfo at the moment...
Not much else I can say to that really...