It looks like it has something to do with Firewall not allowing traffic to the 112jar file located in CUsersuserAppDataRoamingminecraftversionsversion. It Could be that so resetting Internet may help you.
8 Self Tested Solutions To Io Netty Channel Abstractchannel Annotatedconnectexception Error Solutions Self Ip Address
When creating the rule it is important to make sure these.

Io netty channel abstract channel. I had this exception. Due to regular changes in severs using VPN it may block the host server. This error can happen on both single-player and multiplayer servers.
Using a VPN causes the same problem. It works good but on load test it throws an error. If you are using Wi-Fi you can restart your router.
The fundamental driver for the Minecraft connection denied error is the Common IP Connectivity issue. Utilize a believed VPN to dispose of the Abstract Channel Error. You can find the IP address from the computer that is running the server and in the Command Prompt type ipconfig.
11 but the last two number will be different. If this doesnt work move to the next solutions. First next time please include more information about your question such as the server you are trying to join or general PC specs - OS etc or if your game is modded.
Fix Failed to Connect to Server. Minecraft FailedToConnectToTheServer FixHii Friends Welcome Back To My Channel MK Tech In This Tutorial Fix - Minecraft ionettychannelabstractch. I assume that when you say you have Altered the Firewall you mean that you only allowed connections to the Javaexes but NOT the actual 112jar file itself.
Following steps are applied for resetting internet settings. I am using Play 250-M1 on OSx. PlaycoreserverNettyServer - Exception caught in Netty javalangNullPointerException.
Sometimes Windows Firewall blocks the servers of Minecraft which prevents you from connecting to the server. When you reset your router then the IP address provided by ISP changes. Well the IP looks the same as the 192168.
Sometimes Windows Firewall that you are using might be blocking your connection to the server. You need to make sure that the cables are in the right place. Mine craft game was developed by Mojang Studios.
IO Netty Abstract Channel November 5 2020 November 5 2020 by Borut Udovic There are many bizarre errors when trying to start or go into a single player world in Minecraft. Essentially it is a revered form of sandbox survival game crafted in Java language and was launched in 2011 Nov.
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