Maybe there are some problems in VDS?
on your home PC (windows 10), other nodes work fine, but your error goes out.
content:
ethf.conf
masternode=1
masternodeprivkey=
externalip=:52545
rpcuser=someuser
rpcpassword=somepass
server=1
daemon=1
listen=1
rpcallowip=127.0.0.1