Hi there! Me and some friends recently wanted to play a beta version of minecraft, for kicks and nostalgia. While trying to set up the server, I found that there's some sort of bug for joining multiplayer before a certain version. I managed to join an alpha server a few days ago, so I know its possible, but I'm having hangups.
Whenever I try to join my server, even through localhost, I get "java.lang.nullpointerexception" and I can't find a way around it. I've tried MultiMC, the old launcher, retrowrapper, nothing seems to work. I've done my google searching but there's so little documentation on this, or at least it's hard to find using the terms I'm using.
I'd really appreciate some advice on how to get this working!