..............

I solved the connection problem by removing the port number from the given nodes:

addnode=116.203.201.9
addnode=91.121.183.173
addnode=144.202.70.143
addnode=74.222.5.189
addnode=173.255.209.39
addnode=176.223.131.60
addnode=213.108.119.84
addnode=80.209.235.55