I'm sorry for bumping this thread, but I have the same issue and I don't know why. I downloaded the SkyFactory 4 modpack and that came with Forge 1.12.2.2838. So, I downloaded Forge 1.12.2.2838 then try to connect to the server and get the "Missing minecraft:dataserializers" and I really want to join the server but I can't even though I'm hosting it. I always see I get disconnected in the console.
missing registries minecraft data serializers 1.12.2 server
in Support & Bug Reports
Posted
I'm sorry for bumping this thread, but I have the same issue and I don't know why. I downloaded the SkyFactory 4 modpack and that came with Forge 1.12.2.2838. So, I downloaded Forge 1.12.2.2838 then try to connect to the server and get the "Missing minecraft:dataserializers" and I really want to join the server but I can't even though I'm hosting it. I always see I get disconnected in the console.