I run a Minecraft 1.17.1 server on the same machine but when I try to connect to it I can't, while everyone else can join it. I'm connecting to localhost:"port". When the server was still in 1.16.5 it worked just fine. I have my firewall disabled.
This is the error that I get when I try to join.
I think it is some kind of client issue because when I try to use 1.17 to connect to the server (that is in 1.16) I get the same error, not the outdated one.
21 Answer
You can either put 127.0.0.1:{port}, 192.168.1.1, localhost (try it without a port this time), or your public IP.
If that doesn't work just make sure you're using the normal launcher and have 1.17.1 (Not 1.17 it won't work).
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