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
Answer from PixelTubeYT on Stack Exchange
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Forge Forums
forums.minecraftforge.net › home › minecraft forge › support & bug reports › cant get into my server due to java.lang.nullpointerexception [1.19.2]
Cant get into my server due to java.lang.NullPointerException [1.19.2] - Support & Bug Reports - Forge Forums
March 23, 2023 - singleplayer works normal and doesnt crash server debug: https://gist.github.com/Xplodin/3ec81a8128191b8e3c5ca3be2316dd83 client debug: https://gist.github.com/Xplodin/15f5e00f435ad1893baddc07067fc241 Currently in the process of removing mods that seem to add the same functions, but any help woul...
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Reddit
reddit.com › r/minecraft › java.lang.nullpointerexception: group
r/Minecraft on Reddit: java.lang.nullpointerexception: group
October 29, 2018 -

My husband is having trouble connecting to my server when i try to open to Lan. It was working yesterday and now after turning both mine and his pc’s off for the night he cant connect.
He keeps getting this error:
java.lang.nullpointerexception: group
Sometimes on my screen i can see that he has joined the game, then a second later it reads that he has left the game. On his screen it just says "Failed to connect to the server disconnected”
Hope someone can help :)

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Minecraft Forum
minecraftforum.net › home › minecraft forum › support › java edition support › modded server error: java.lang.nullpointerexception: unexpected error
Modded Server Error: java.lang.NullPointerException: Unexpected error - Java Edition Support - Support - Minecraft Forum - Minecraft Forum
Minecraft: Dweller_Benthos · Member Details · Since it's a server, and other players have used that spell, it's probably something the backpack is doing that the other players didn't have, and the backpack is conflicting with the Ars spell. About the only thing I can think of is have the server admin edit your player file and see if they can remove the backpack and see if that works when you join.
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Aternos Community
board.aternos.org › thread › 85052-java-lang-nullpointerexception-unexpected-error
java.lang.NullPointerException: Unexpected error - Server - Aternos Community
January 7, 2022 - Try deleting the config folder which is located in the minecraft installation path (enter %appdata%/.minecraft in the file explorer ) and if it doesn't work then try deleting aether mod
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Planet Minecraft
planetminecraft.com › forums › help › javaedition › internal exception: java.lang.nullpointerexception
Internal Exception: java.lang.NullPointerException
So now I'm trying to play multiplayer and I keep getting "Internal Exception: java.lang.NullPointerException" on trying to join servers. I put in the server name and IP, then save that to the list. I go back to list, select, and click "Join Server" .... It says "connecting to network" "logging in ..." and then our error pops up and I can't wiggle past it.
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Minecraft Forum
minecraftforum.net › home › minecraft forum › support › server support and administration › server error java.lang.nullpointerexception: null help
Server Error java.lang.NullPointerException: null Help - Server Support and Administration - Support - Minecraft Forum - Minecraft Forum
Once my computer turned on again there was this error and now I can't play at the server at all. We play at 1.16.3 in Java. I have looked online but I didn't find anything that would help or was too tech and I didn't understand. Please tell me how I can solve this as simple as possible · Here's the error text: java.lang.NullPointerException: null at net.minecraft.server.MinecraftServer.a(SourceFile:569) ~[server.jar:?] at net.minecraft.server.MinecraftServer.t(SourceFile:596) ~[server.jar:?] at zg.t(SourceFile:558) ~[server.jar:?] at net.minecraft.server.MinecraftServer.w(SourceFile:704) ~[server.jar:?] at net.minecraft.server.MinecraftServer.a(SourceFile:254) ~[server.jar:?] at java.lang.Thread.run(Unknown Source) [?:1.8.0_261] Rollback Post to Revision RollBack ·
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SpigotMC
spigotmc.org › threads › java-lang-nullpointerexception.620519
Solved - java.lang.NullPointerException | SpigotMC - High Performance Minecraft Community
Hi, while administering my server I came across the java.lang.NullPointerException error, I don't know what it is related to and it would be nice if...
Find elsewhere
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Hypixel Forums
hypixel.net › home › forums › hypixel server › community help forum
Error Java . Lang . NullPointerException Please help me | Hypixel Forums
July 20, 2017 - Hi, I have encountered a problem... Yesterday I was playing absolutely fine with minecraft forge, and then today for some reason, I cant login to hypixel, and it comes up with this (see image Below) I tried reinstalling java, minecraft and forge, yet still the problem persists. I tried running...
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Minecraft Forum
minecraftforum.net › home › minecraft forum › support › java edition support › java.lang.nullpointerexception, need fix please help
java.lang.NullPointerException, need fix please help - Java Edition Support - Support - Minecraft Forum - Minecraft Forum
Time: 10/6/12 1:25 PM Description: ... - Minecraft Version: 1.3.2 - Operating System: Windows 7 (amd64) version 6.1 - Java Version: 1.7.0_05, Oracle Corporation - Java VM Version: Java HotSpot™ 64-Bit Server VM (mixed mode), Oracle Corporation - Memory: 382101640 bytes (364 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB) - JVM Flags: 2 total; -Xms512m -Xmx1024m - FML: ~ERROR~ NullPointerException: null - LWJGL: ...
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SpigotMC
spigotmc.org › threads › players-get-disconnect-and-java-lang-nullpointerexception.357028
Players get disconnect and java.lang.NullPointerException | SpigotMC - High Performance Minecraft Community
Hello, Last two days i'm in a trouble. This problem why really i don't know. Players get disconnect and no any error just im saw this when they...
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Reddit
reddit.com › r/moddedmc › internal exception java.lang.nullpointerexception can not invoke "net.minecraft.nbt.compoundtag.m_128459_(string) | forge 1.20.1 server
r/ModdedMC on Reddit: internal exception java.lang.nullpointerexception can not invoke "net.minecraft.nbt.compoundtag.m_128459_(string) | Forge 1.20.1 Server
April 17, 2024 -

when people try to connect to my server, they receive this error message
internal exception java.lang.nullpointerexception can not invoke "net.minecraft.nbt.compoundtag.m_128459_(string)

i also received this error message as well but during this test for some reason it let me join the server, i've tested this out on singleplayer as well and the world works fine nothing seems to be corrupted it just doesn't work for the server.
we've also made multiple worlds for this specific pack i've made and they all have had this problem, randomly sometimes people will be able to join and play normally but other times they get this error and they cant play.
friends latest.log: https://mclo.gs/mHmks83
servers lastest.log: https://mclo.gs/si9AJk2

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YouTube
youtube.com › howtounleashed
How To Fix Minecraft java.lang.NullPointerException? - YouTube
How To Fix Minecraft java.lang.NullPointerException?In this video I will explain How To Fix the Minecraft java.lang.NullPointerException problem.Get NordVPN ...
Published   November 30, 2023
Views   3K
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SpigotMC
spigotmc.org › threads › java-lang-nullpointerexception-null.557149
Solved - java.lang.NullPointerException: null | SpigotMC - High Performance Minecraft Community
Hey, i'm starting to code in minecraft, but now i got a problem, how can i fix that? Here is the console: https://prnt.sc/C9soFNW-3Vth And my classes...
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Minecraft Forum
minecraftforum.net › home › minecraft forum › support › server support and administration › common server error (nullpointerexception)
Common Server Error (NullPointerException) - Server Support and Administration - Support - Minecraft Forum - Minecraft Forum
Minecraft Server crashes when starting up, showing the following error: [SEVERE] Unexpected exception java.lang.NullPointerException at en.c(SourceFile:72) at eh.a(SourceFile:2124) at jf.d(SourceFile:572) at ja.c(SourceFile:67) at ja.b(SourceFile:81) at eh.c(SourceFile:319) at eh.a(SourceFile:276) at eh.f(SourceFile:280) at eh.a(SourceFile:217) at st.a(SourceFile:50) at eh.c(SourceFile:189) at eh.<init>(SourceFile:150) at en.<init>(SourceFile:25) at net.minecraft.server.MinecraftServer.a(SourceFile:195) at net.minecraft.server.MinecraftServer.c(SourceFile:150) at net.minecraft.server.MinecraftServer.run(SourceFile:279) at ce.run(SourceFile:417) Cause
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CubeCoders Support
discourse.cubecoders.com › technical support
Startup Issue with Minecraft - Java null pointer exception on boot - Technical Support - CubeCoders Support
September 15, 2023 - System Information Field Value Operating System Linux - Debian GNU/Linux 11 on x86_64 Product AMP ‘Decadeus’ v2.4.6.6 (Mainline) Virtualization QEMU_KVM Application Minecraft Module MinecraftModule Running in Container No Current State Failed Problem Description Issue The server was running ...
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YouTube
youtube.com › quick and easy
How To Fix Minecraft java.lang.NullPointerException [Very EASY!] - YouTube
In this video I will show you how to fix minecraft java.lang.nullpointerexception.Hit the Like button and Subscribe to the channel to receive various useful ...
Published   February 5, 2023
Views   100K