Minecraft Crash Report -------- Minecraft Crash Report ----// You should try our sister game, Minceraft!
Time: 28/07/19 16:15Description: 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 wb.f(SourceFile:55) at wb$$Lambda$2352/339082934.get(Unknown Source) at zv.a(SourceFile:16) at wb.a(SourceFile:136) at cyc.a(SourceFile:1640) at dfu$a.e(SourceFile:380) at dfu$a.a(SourceFile:311) at dft$$Lambda$1823/823663080.accept(Unknown Source) at java.util.Optional.ifPresent(Optional.java:159) at dft.f(SourceFile:51) at dft$$Lambda$1811/1930040331.onPress(Unknown Source) at czi.onPress(SourceFile:18) at czd.onClick(SourceFile:15) at czg.mouseClicked(SourceFile:154) at dad.mouseClicked(SourceFile:27) at cyd.b(SourceFile:86) at cyd$$Lambda$1751/2122245047.run(Unknown Source) at dcl.wrapScreenError(SourceFile:441) at cyd.a(SourceFile:86) at cyd$$Lambda$1456/1175829504.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 cuo.c(SourceFile:291) at cyc.b(SourceFile:1027) at cyc.e(SourceFile:976) at cyc.b(SourceFile:410) at net.minecraft.client.main.Main.main(SourceFile:155)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) ... 34 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:175) ... 38 moreCaused by: java.net.ConnectException: Connection refused: 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) ... 46 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: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 wb.f(SourceFile:55) at wb$$Lambda$2352/339082934.get(Unknown Source) at zv.a(SourceFile:16) at wb.a(SourceFile:136) at cyc.a(SourceFile:1640) at dfu$a.e(SourceFile:380) at dfu$a.a(SourceFile:311) at dft$$Lambda$1823/823663080.accept(Unknown Source) at java.util.Optional.ifPresent(Optional.java:159) at dft.f(SourceFile:51) at dft$$Lambda$1811/1930040331.onPress(Unknown Source) at czi.onPress(SourceFile:18) at czd.onClick(SourceFile:15) at czg.mouseClicked(SourceFile:154) at dad.mouseClicked(SourceFile:27) at cyd.b(SourceFile:86) at cyd$$Lambda$1751/2122245047.run(Unknown Source)
– Affected screen --Details: Screen name: dftStacktrace: at dcl.wrapScreenError(SourceFile:441) at cyd.a(SourceFile:86) at cyd$$Lambda$1456/1175829504.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 cuo.c(SourceFile:291) at cyc.b(SourceFile:1027) at cyc.e(SourceFile:976) at cyc.b(SourceFile:410) at net.minecraft.client.main.Main.main(SourceFile:155)
Related issues
Comments

Thank you for your report!
We're actually already tracking this issue in MC-34749, so I resolved and linked this ticket as a duplicate.
However, that ticket has already been resolved. Depending on the resolution, that can mean that it either will be fixed in the next version, or that it is not considered a bug and won't be fixed.
If you haven't already, you might like to make use of the search feature in the future to see if the issue has already been reported.
i have reinstalling the game. as well as disabling my anti-virus and firewall but to no prevail. the game will not launch and keeps giving the above error.