Thanks, it is strange. Because of some problems i removed the data folder and started to synchronize from block 1 on. But i still get the sign "no connections" :/
Here are some active nodes:
addnode=204.11.237.233
addnode=138.91.64.21
addnode=144.76.239.66
addnode=108.91.74.25
addnode=2602:306:c5b4:a190:941:98aa:b07:c9c0
addnode=195.200.244.73
addnode=101.165.90.37
ref:
http://www.blocktree.io/peers/XAI/