I can't access the site either and apparently, they never tweeted anything after the DDOS attack tweet on the 8th of May, so it's probably still ongoing.
As for how to access to coins, then you can
export the PKs and then sweep them using
Coinomi (The article is speaking about BTC wallets, but the same concept applies for Doge, just scroll down to the sweeping part).
Its an issue that apeared today as I have been using my Dogecoins every day for the past month+ without problems.
Did I post this thread in the correct sub-forum? Sorry if I didnt and could you link me to the right place to ask this?