You can try to update nodes, it works for me.
seed-node = bts-seed1.abit-more.com:62015
seed-node = seed.blocktrades.us:1776
seed-node = seed.bitsharesnodes.com:1776
seed-node = seed.steemd.com:34191
seed-node = seed04.bts-nodes.net:1776
seed-node = seed05.bts-nodes.net:1776
seed-node = seed06.bts-nodes.net:1776
seed-node = seed07.bts-nodes.net:1776
seed-node = bts.lafona.net:1776
seed-node = seed.bitsharesdex.com:50696
seed-node = 128.199.143.47:2015
seed-node = seed.roelandp.nl:1776
seed-node = node.blckchnd.com:4243
seed-node = 23.92.53.182:1776