Error Messages

TypeError cannot find function main in object... OR can't run main() of undefined
  This is a common error that occurs when the user is trying to run a 'stale' book. Meaning, the book is in the user's inventory, but the mod&...
Wed, 21 Oct, 2020 at 12:53 PM
Connection timed out. Java.net.ConnectException" Connection Timed Out: No Further Info
If you see the error message " Java.net.ConnectException" Connection Timed Out: No Further Info " when trying to connect to your Mine...
Tue, 29 Jun, 2021 at 7:59 PM
Failed to login: The authentication are currently down for maintenance.
Unfortunately, this error is not LearnToMod related, but Mojang related. Check out this video:https://www.youtube.com/watch?v=2chPp0rLkyw This usually...
Fri, 21 Aug, 2015 at 8:21 PM
Cannot Fetch World From Storage. Log Out And Try Again
The fix for this is to download a new world. Go to the LearnToMod homepage and select a world to download. (Click on the 'What's Hot' tab in...
Mon, 6 Feb, 2017 at 3:46 PM
Failed to Log In: Invalid Session
You'll get that error for a few possible reasons:  - You don't yet have an official Minecraft license, but are using something like a Team Ext...
Fri, 21 Aug, 2015 at 8:37 PM
The connection was forcibly closed
It's always possible cause of the problem could be Mojang or LearnToMod's server having problems or a firewall / antivirus being too overzealous. B...
Wed, 21 Oct, 2020 at 12:28 PM
I'm not in a class, but the LTM Minecraft server says I am! What gives.
That particular error message 'in a class' can mean two things. 1. It might mean that you are currently enrolled in a free LearnToMod clas...
Mon, 22 Aug, 2016 at 3:50 PM
Setting your Minecraft username on LearnToMod
Our software should auto detect and auto save your Minecraft username when you first use our Minecraft server. But if you're unable to use commands, o...
Sun, 17 May, 2020 at 9:46 AM
Can't run mods in LTM Minecraft - no error messages
If you can enter your world in our Minecraft server, can't run mods in there but see no error messages: Is your Minecraft username saved on our web...
Tue, 2 Feb, 2021 at 10:46 PM
Connection Lost Internal Exception: io.netty.handler.codec.DecoderException: IntArray with size 1 is bigger than allowed 0
According to Mojang, this bug appears to be specific to Minecraft versions 1.9 and 1.9.1 -- try switching to version 1.9.2 Here's how to update ...
Wed, 16 Aug, 2017 at 9:33 PM