I start up Minecraft like usual click multi player and click my private server now it keeps coming up with this error. I don't know what to do. I have try everything from the internet. I also use TeamSpeak 3 voice chat with my friend and that worked. He was able to connect to the server with no problem.
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We're tracking this issue in MC-120362, so this ticket is being resolved and linked as a duplicate.
That ticket has already been resolved as invalid, which means this is a technical support issue. Please take a look at the parent ticket (MC-120362) and see if a solution is provided there.
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Duplicates MC-120362