Hello, I've been getting the following error:

The game crashed whilst mouseclicked event handler
Error: java.lang.IllegalStateException: failed to create a child event loop

every time i try to join a world or create a new one in singleplayer, the game crashes and I get that message, also multiplayer won't work.

I did all minecraft bug forums said to do, adding -Djava.net.preferIPv4Stack=true to the JVM Arguments, uninstalling antivirus software, reinstalling minecraft, reinstalling java -> but my game will not work.

Please do not link MC-34749 -> i have checked and tried but found no solutions to my issue

I am struggling to find a solution to this problem, would appreciate anybody's help!

Full crash report:
---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 5/16/20 2:36 PM
Description: mouseClicked event handler

java.lang.IllegalStateException: failed to create a child event loop
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
at xu.f(SourceFile:55)
at xu$$Lambda$2678/2086425573.get(Unknown Source)
at abn.a(SourceFile:16)
at xu.a(SourceFile:136)
at dbn.a(SourceFile:1676)
at djl$a.e(SourceFile:379)
at djl$a.a(SourceFile:311)
at djl$a.mouseClicked(SourceFile:257)
at dcr.mouseClicked(SourceFile:321)
at ddr.mouseClicked(SourceFile:27)
at dbo.b(SourceFile:86)
at dbo$$Lambda$2087/344247127.run(Unknown Source)
at dgb.wrapScreenError(SourceFile:447)
at dbo.a(SourceFile:86)
at dbo.c(SourceFile:150)
at dbo$$Lambda$2086/742474488.run(Unknown Source)
at ais.execute(SourceFile:94)
at dbo.b(SourceFile:150)
at dbo$$Lambda$1485/427665153.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:123)
at dbn.d(SourceFile:1015)
at dbn.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:204)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:177)
at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:151)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
... 32 more
Caused by: java.io.IOException: Unable to establish loopback connection
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
at java.security.AccessController.doPrivileged(Native Method)
at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
at java.nio.channels.Pipe.open(Pipe.java:155)
at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
... 36 more
Caused by: java.net.SocketException: Unrecognized Windows Sockets error: 10106: socket
at sun.nio.ch.Net.socket0(Native Method)
at sun.nio.ch.Net.serverSocket(Net.java:420)
at sun.nio.ch.ServerSocketChannelImpl.<init>(ServerSocketChannelImpl.java:88)
at sun.nio.ch.SelectorProviderImpl.openServerSocketChannel(SelectorProviderImpl.java:56)
at java.nio.channels.ServerSocketChannel.open(ServerSocketChannel.java:108)
at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:123)
at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
... 44 more

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Thread: Render thread
Stacktrace:
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
at io.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
at io.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
at xu.f(SourceFile:55)
at xu$$Lambda$2678/2086425573.get(Unknown Source)
at abn.a(SourceFile:16)
at xu.a(SourceFile:136)
at dbn.a(SourceFile:1676)
at djl$a.e(SourceFile:379)
at djl$a.a(SourceFile:311)
at djl$a.mouseClicked(SourceFile:257)
at dcr.mouseClicked(SourceFile:321)
at ddr.mouseClicked(SourceFile:27)
at dbo.b(SourceFile:86)
at dbo$$Lambda$2087/344247127.run(Unknown Source)

– Affected screen –
Details:
Screen name: djk
Stacktrace:
at dgb.wrapScreenError(SourceFile:447)
at dbo.a(SourceFile:86)
at dbo.c(SourceFile:150)
at dbo$$Lambda$2086/742474488.run(Unknown Source)
at ais.execute(SourceFile:94)
at dbo.b(SourceFile:150)
at dbo$$Lambda$1485/427665153.invoke(Unknown Source)
at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
at org.lwjgl.system.JNI.invokeV(Native Method)
at org.lwjgl.glfw.GLFW.glfwWaitEventsTimeout(GLFW.java:3174)
at com.mojang.blaze3d.systems.RenderSystem.limitDisplayFPS(SourceFile:123)
at dbn.d(SourceFile:1015)
at dbn.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:204)

– System Details –
Details:
Minecraft Version: 1.15.2
Minecraft Version ID: 1.15.2
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1395001688 bytes (1330 MB) / 2147483648 bytes (2048 MB) up to 2147483648 bytes (2048 MB)
CPUs: 2
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
Launched Version: 1.15.2
Backend library: LWJGL version 3.2.2 build 10
Backend API: GeForce GTX 750 Ti/PCIe/SSE2 GL version 4.6.0 NVIDIA 445.87, NVIDIA Corporation
GL Caps: Using framebuffer using OpenGL 3.0
Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Resource Packs:
Current Language: English (US)
CPU: 2x Intel(R) Pentium(R) CPU G3420 @ 3.20GHz