Error: java.lang.IllegalStateException: failed to create a child event loop

Tried disabling the private Network, tried without Avira Antivirus, tried the JVM Argument "-Djava.net.preferIPv4Stack=true".

Worked once after adding the JVM Argument. Didn't play for a couple of days and the next time I started Minecraft it crashed again.

I repeated the above mentioned steps again, including reinstalling MC and Java, aswell as turning the firewall off and adding the Argument back.

 

---- Minecraft Crash Report -------- Minecraft Crash Report ----// I bet Cylons wouldn't have this problem.
Time: 4/25/20 8:51 PMDescription: Updating screen events
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:58) 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 net.minecraft.network.NetworkSystem$1.func_179280_b(NetworkSystem.java:52) at net.minecraft.network.NetworkSystem$1.func_179280_b(NetworkSystem.java:49) at net.minecraft.util.LazyLoadBase.func_179281_c(SourceFile:10) at net.minecraft.network.NetworkSystem.func_151270_a(NetworkSystem.java:140) at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2414) at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:224) at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:443) at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:416) at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:533) at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501) at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1759) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398) at net.minecraft.client.main.Main.main(SourceFile:123) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)Caused by: io.netty.channel.ChannelException: failed to open a new selector at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:157) at io.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127) at io.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36) at io.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84) ... 26 moreCaused by: java.io.IOException: Unable to establish loopback connection at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:101) at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:68) at java.security.AccessController.doPrivileged(Native Method) at sun.nio.ch.PipeImpl.<init>(PipeImpl.java:170) at sun.nio.ch.SelectorProviderImpl.openPipe(SelectorProviderImpl.java:50) at java.nio.channels.Pipe.open(Pipe.java:155) at sun.nio.ch.WindowsSelectorImpl.<init>(WindowsSelectorImpl.java:127) at sun.nio.ch.WindowsSelectorProvider.openSelector(WindowsSelectorProvider.java:44) at io.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:155) ... 30 moreCaused by: java.net.BindException: Cannot assign requested address: connect at sun.nio.ch.Net.connect0(Native Method) at sun.nio.ch.Net.connect(Net.java:458) at sun.nio.ch.Net.connect(Net.java:450) at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:648) at java.nio.channels.SocketChannel.open(SocketChannel.java:189) at sun.nio.ch.PipeImpl$Initializer$LoopbackConnector.run(PipeImpl.java:130) at sun.nio.ch.PipeImpl$Initializer.run(PipeImpl.java:83) ... 38 more

A detailed walkthrough of the error, its code path and all known details is as follows:---------------------------------------------------------------------------------------
– Head --Thread: Client threadStacktrace: 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:58) 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 net.minecraft.network.NetworkSystem$1.func_179280_b(NetworkSystem.java:52) at net.minecraft.network.NetworkSystem$1.func_179280_b(NetworkSystem.java:49) at net.minecraft.util.LazyLoadBase.func_179281_c(SourceFile:10) at net.minecraft.network.NetworkSystem.func_151270_a(NetworkSystem.java:140) at net.minecraft.client.Minecraft.func_71371_a(Minecraft.java:2414) at net.minecraft.client.gui.GuiCreateWorld.func_146284_a(GuiCreateWorld.java:224) at net.minecraft.client.gui.GuiScreen.func_73864_a(GuiScreen.java:443) at net.minecraft.client.gui.GuiCreateWorld.func_73864_a(GuiCreateWorld.java:416) at net.minecraft.client.gui.GuiScreen.func_146274_d(GuiScreen.java:533) at net.minecraft.client.gui.GuiScreen.func_146269_k(GuiScreen.java:501)
– Affected screen --Details: Screen name: net.minecraft.client.gui.GuiScreenWorkingStacktrace: at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1759) at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1098) at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:398) at net.minecraft.client.main.Main.main(SourceFile:123) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at net.minecraft.launchwrapper.Launch.launch(Launch.java:135) at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
– System Details --Details: Minecraft Version: 1.12.2 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: 718554616 bytes (685 MB) / 1209532416 bytes (1153 MB) up to 3008888832 bytes (2869 MB) JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3228m -Xms256m -XX:PermSize=256m IntCache: cache: 0, tcache: 9, allocated: 20, tallocated: 86 FML: MCP 9.42 Powered by Forge 14.23.5.2854 4 mods loaded, 4 mods active States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

Loaded coremods (and transformers):  GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 441.20' Renderer: 'GeForce GTX 1060/PCIe/SSE2' Launched Version: forge-14.23.5.2854 LWJGL: 2.9.4 OpenGL: GeForce GTX 1060/PCIe/SSE2 GL version 4.6.0 NVIDIA 441.20, NVIDIA Corporation GL Caps: Using GL 1.3 multitexturing.Using GL 1.3 texture combiners.Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.Shaders are available because OpenGL 2.1 is supported.VBOs are available because OpenGL 1.5 is supported.
Using VBOs: Yes Is Modded: Definitely; Client brand changed to 'fml,forge' Type: Client (map_client.txt) Resource Packs:  Current Language: English (US) Profiler Position: N/A (disabled) CPU: 8x Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz