6 Ways To Fix Error Internal Exception: io.netty.handler.codec.EncoderException: java.lang
I am giving you solution in this tutorial for the following error message in Minecraft:
Internal Exception: io.netty.handler.codec.EncoderException: java.lang.NoSuchMethodError: 'org.bukkit.advancement.Advancement net.minecraft.advancements.AdvancementHolder.toBukkit()
You can check out these tips to get rid of this error message:
Step 1 – The IP address should be same on the server and Minecraft Launcher
Step 2 – Make Your Minecraft Server Online
Step 3 – Check The Server Version In Your Account
• Login to Aternos account with your username and password
• Go to your server
• Scroll down and check the version
• Now, go to client portal and check the version
• They should be same
Step 4 – Use Whitelist or Allowlist To Fix This Error
• Login to Aternos account with your username and password
• Go to your server
• Go to “Options” from the left hand pane
• Turn on in front of “Allowlist” (Note: Allowlist and Whitelist are same)
• Also, try to turn off Allowlist once to see which is resolving this issue
Step 5 – Download Right Mods
Step 6 – Clear Host Cache In Web Browser and Computer
Clear DNS Host Cache from Google Chrome:
• Open Google Chrome
• In address bar, enter “chrome://net-internals/#dns” and press Enter
• In DNS, enter domain name and click Lookup
• Tap on “Clear host cache”
Clear DNS From Command Prompt:
• In Windows search, type “Command Prompt”
• Right click over it and select Run as administrator
• In Command Prompt, enter command “ipconfig /flushdns” and press Enter
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