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My friend is having a really annoying problem with his minecraft but he doesn't have a SE account so I thought I'd ask this for him: Whenever he tries to log onto a server he gets this message:

java.lang.NullPointerException group.  

We have tried:

  • Reinstalling minecraft(including the .minecraft folder),

  • Reinstalling java,

  • Eradicating everything java related on his PC,

  • Disabling his antivirus,

  • Flushing the DNS cache,

  • signing off and signing in to minecraft,

  • Restarting his PC,

  • Raging :(

How can we fix this?

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    What exactly does the NullPointerException state? Please post the stack trace. – dly Aug 22 '16 at 7:20
  • Have you tried changing the launcher viability? – BritishFerret Aug 22 '16 at 10:26
  • everything is ok. My friend uninstalled his antivirus completely, it seems to be a common problem with avast users. – Max Sep 6 '16 at 1:59
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Your problem is already fixed probably, but for the people who are searching for a fix, follow my steps

  1. Search for CMD and run it as administrator
  2. Type in the bar: netsh winsock reset
  3. It should be fixed!
  4. If it still doesn't work, try contacting Mojang, the creators of Minecraft
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If you are playing newer snapshots, This was a recent bug in the 17w14-16

They seem to have finally fixed it in 17w17a/b

It seemed to be related to a number of new additions like advancements and parrots.

Update your server_jar and your minecraft client to 17w17b (current)

If you are getting this issue on 1.11.2 release. Then open a bug report at bugs.mojang.com

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This works for real. My friends and I have tried this and it worked. now i can play Minecraft no problem. So try this. If Minecraft has the dull error go to your folder. press minecraft installer. Press repair and finish let it redo that. Then go to launch options and delete all the modes that are the same. like The latest release and there is a 1.12.2 . Delete that 1.12.2 . Please try this it worked for me and my friends I hope it does for you!

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