The game crashed whilst mouseclicked event handlerError: java.lang.IllegalStateException: failed to create a child event loopExit-Code: -1

Hallo, ich komme seit der 1.17.1 nicht mehr in meine Minecraft-Welt rein. Immer nachdem sie zu 100% geladen ist und Welt wird gespeichert erscheint, stürzt Minecraft ab und ich bekomme diese Fehlermeldung:  The game crashed whilst mouseclicked event handler
Error: java.lang.IllegalStateException: failed to create a child event loop
Exit-Code: -1 . Ich weiß nicht mehr, was ich machen soll, könnte mir jemand helfen?

Der ganze Bericht ist unten, Gruß Paul

Minecraft Crash Report ----
// Oops.

Time: 22.08.21, 15:11
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 aci.f(SourceFile:56)
at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160)
at agx.a(SourceFile:19)
at aci.a(SourceFile:148)
at dvp.a(SourceFile:2083)
at dvp.a(SourceFile:1939)
at eel$a.h(SourceFile:437)
at eel$a.b(SourceFile:343)
at eel$a.a(SourceFile:279)
at dww.a(SourceFile:359)
at dxx.a(SourceFile:27)
at dvq.b(SourceFile:94)
at eaq.a(SourceFile:490)
at dvq.a(SourceFile:94)
at dvq.c(SourceFile:165)
at aqv.execute(SourceFile:101)
at dvq.b(SourceFile:165)
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:165)
at dpr.e(SourceFile:310)
at dvp.f(SourceFile:1137)
at dvp.e(SourceFile:728)
at net.minecraft.client.main.Main.main(SourceFile:217)
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)
... 31 more
Caused by: java.io.IOException: Unable to establish loopback connection
at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101)
at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:67)
at java.base/java.security.AccessController.doPrivileged(AccessController.java:554)
at java.base/sun.nio.ch.PipeImpl.<init>(PipeImpl.java:194)
at java.base/sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:143)
at java.base/sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44)
at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
... 35 more
Caused by: java.net.SocketException: Permission denied: connect
at java.base/sun.nio.ch.Net.connect0(Native Method)
at java.base/sun.nio.ch.Net.connect(Net.java:576)
at java.base/sun.nio.ch.Net.connect(Net.java:583)
at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:851)
at java.base/java.nio.channels.SocketChannel.open(SocketChannel.java:285)
at java.base/sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:131)
at java.base/sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83)
... 41 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 aci.f(SourceFile:56)
at com.google.common.base.Suppliers$NonSerializableMemoizingSupplier.get(Suppliers.java:160)
at agx.a(SourceFile:19)
at aci.a(SourceFile:148)
at dvp.a(SourceFile:2083)
at dvp.a(SourceFile:1939)
at eel$a.h(SourceFile:437)
at eel$a.b(SourceFile:343)
at eel$a.a(SourceFile:279)
at dww.a(SourceFile:359)
at dxx.a(SourceFile:27)
at dvq.b(SourceFile:94)

– Affected screen –
Details:
Screen name: eei
Stacktrace:
at eaq.a(SourceFile:490)
at dvq.a(SourceFile:94)
at dvq.c(SourceFile:165)
at aqv.execute(SourceFile:101)
at dvq.b(SourceFile:165)
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:165)

– Last reload –
Details:
Reload number: 1
Reload reason: initial
Finished: Yes
Packs: Default
Stacktrace:
at dvx.a(SourceFile:49)
at dvp.c(SourceFile:2406)
at dvp.e(SourceFile:747)
at net.minecraft.client.main.Main.main(SourceFile:217)

– System Details –
Details:
Minecraft Version: 1.17.1
Minecraft Version ID: 1.17.1
Operating System: Windows 7 (amd64) version 6.1
Java Version: 16.0.1, Microsoft
Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Microsoft
Memory: 630741640 bytes (601 MiB) / 2147483648 bytes (2048 MiB) up to 2147483648 bytes (2048 MiB)
CPUs: 4
Processor Vendor: GenuineIntel
Processor Name: Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz
Identifier: Intel64 Family 6 Model 15 Stepping 11
Microarchitecture: Core (Client)
Frequency (GHz): 2,66
Number of physical packages: 1
Number of physical CPUs: 4
Number of logical CPUs: 4
Graphics card #0 name: NVIDIA Quadro K2000
Graphics card #0 vendor: NVIDIA (0x10de)
Graphics card #0 VRAM (MB): 2048,00
Graphics card #0 deviceId: 0x0ffe
Graphics card #0 versionInfo: DriverVersion=26.21.14.4166
Memory slot #0 capacity (MB): 1024,00
Memory slot #0 clockSpeed (GHz): 0,00
Memory slot #0 type: Unknown
Memory slot #1 capacity (MB): 1024,00
Memory slot #1 clockSpeed (GHz): 0,00
Memory slot #1 type: Unknown
Memory slot #2 capacity (MB): 1024,00
Memory slot #2 clockSpeed (GHz): 0,00
Memory slot #2 type: Unknown
Memory slot #3 capacity (MB): 1024,00
Memory slot #3 clockSpeed (GHz): 0,00
Memory slot #3 type: Unknown
Virtual memory max (MB): 16379,12
Virtual memory used (MB): 6218,98
Swap memory total (MB): 8188,63
Swap memory used (MB): 249,34
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: 1.17.1
Backend library: LWJGL version 3.2.2 build 10
Backend API: Quadro K2000/PCIe/SSE2 GL version 3.2.0 NVIDIA 441.66, NVIDIA Corporation
Window size: 1920x1080
GL Caps: Using framebuffer using OpenGL 3.2
GL debug messages:
Using VBOs: Yes
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.
Type: Integrated Server (map_client.txt)
Graphics mode: fancy
Resource Packs: vanilla
Current Language: Deutsch (Deutschland)
CPU: 4x Intel(R) Core(TM)2 Quad CPU Q6700 @ 2.66GHz
Player Count: 0 / 8; []
Data Packs: vanilla