I had the same problem and found working nodes:
 
addnode=144.202.68.5:22780
addnode=192.99.19.160:22780
addnode=37.58.57.74:22780
addnode=45.32.215.87:22780
addnode=46.236.162.178:22780
addnode=47.89.251.57:22780
addnode=8.12.18.35:22780
   
I hope this helps.