can't mine as it gives communication error everytime while submitting block

are you connected to more than one node?
It should not matter until 130Mil, but all this nodes have the latets version, try connecting to them.
addnode=31.220.51.2
addnode=50.197.11.193
addnode=69.123.144.189
addnode=80.220.134.196
addnode=105.227.83.136
addnode=188.134.72.213
addnode=194.68.37.100
addnode=213.87.141.23