---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!
Time: 12/02/20 20:52
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$$Lambda$2716/580431625.get(Unknown Source)
 at abn.a(SourceFile:16)
 at xu.a(SourceFile:136)
 at dbn.a(SourceFile:1676)
 at djl$a.e(SourceFile:379)
 at djl$a.a(SourceFile:311)
 at djl$a.mouseClicked(SourceFile:252)
 at dcr.mouseClicked(SourceFile:321)
 at ddr.mouseClicked(SourceFile:27)
 at dbo.b(SourceFile:86)
 at dbo$$Lambda$2107/1339990750.run(Unknown Source)
 at dgb.wrapScreenError(SourceFile:447)
 at dbo.a(SourceFile:86)
 at dbo.c(SourceFile:150)
 at dbo$$Lambda$2106/1998748447.run(Unknown Source)
 at ais.execute(SourceFile:94)
 at dbo.b(SourceFile:150)
 at dbo$$Lambda$1503/25623662.invoke(Unknown Source)
 at org.lwjgl.glfw.GLFWMouseButtonCallbackI.callback(GLFWMouseButtonCallbackI.java:36)
 at org.lwjgl.system.JNI.invokeV(Native Method)
 at org.lwjgl.glfw.GLFW.glfwPollEvents(GLFW.java:3101)
 at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:105)
 at cxx.e(SourceFile:301)
 at dbn.d(SourceFile:1012)
 at dbn.d(SourceFile:619)
 at net.minecraft.client.main.Main.main(SourceFile:204)
Caused by: io.netty.channel.ChannelException: failed to open a new selector
 at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:177)
 at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:151)
 at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
 at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
 at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
 ... 33 more
Caused by: java.io.IOException: Unable to establish loopback connection
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68)
 at java.security.AccessController.doPrivileged(Native Method)
 at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170)
 at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50)
 at java.nio.channels.Pipe.open(Pipe.java:155)
 at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127)
 at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
 at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
 ... 37 more
Caused by: java.net.ConnectException: Connection timed out: connect
 at sun.nio.ch.Net.connect0(Native Method)
 at sun.nio.ch.Net.connect(Net.java:458)
 at sun.nio.ch.Net.connect(Net.java:450)
 at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648)
 at java.nio.channels.SocketChannel.open(SocketChannel.java:189)
 at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130)
 at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
 ... 45 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$$Lambda$2716/580431625.get(Unknown Source)
 at abn.a(SourceFile:16)
 at xu.a(SourceFile:136)
 at dbn.a(SourceFile:1676)
 at djl$a.e(SourceFile:379)
 at djl$a.a(SourceFile:311)
 at djl$a.mouseClicked(SourceFile:252)
 at dcr.mouseClicked(SourceFile:321)
 at ddr.mouseClicked(SourceFile:27)
 at dbo.b(SourceFile:86)
 at dbo$$Lambda$2107/1339990750.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$$Lambda$2106/1998748447.run(Unknown Source)
 at ais.execute(SourceFile:94)
 at dbo.b(SourceFile:150)
 at dbo$$Lambda$1503/25623662.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.glfwPollEvents(GLFW.java:3101)
 at com.mojang.blaze3d.systems.RenderSystem.flipFrame(SourceFile:105)
 at cxx.e(SourceFile:301)
 at dbn.d(SourceFile:1012)
 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 10 (amd64) version 10.0
 Java Version: 1.8.0_51, Oracle Corporation
 Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
 Memory: 1436218792 bytes (1369 MB) / 1979711488 bytes (1888 MB) up to 2147483648 bytes (2048 MB)
 CPUs: 8
 JVM Flags: 9 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xss1M -Xmx2G -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: Intel(R) UHD Graphics 630 GL version 4.5.0 - Build 25.20.100.6446, Intel
 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: 8x Intel(R) Core(TM) i5-8300H CPU @ 2.30GHz