I'm getting the "io.netty.channel.abstractchannel$annotatedconnectexception: connection refused: no further information:" crash notification whenever I change the version from 1.14 to 1.12.2 on my server and I don't know why. It is not my firewall, checked all of this already.
I installed forge on my server, integrated the server file and all, but the mods won't load. The log file says something about invalid. Please help me.
Here are the logs: