Unable to start Forge server and send ticket

Technical Support
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OS Name/Version: Ubuntu Server 24.04.2 LTS

Product Name/Version: AMP 2.6.1.6 (Minecraft Java Edition 1.16.5/Forge 36.2.39)

Problem Description: I’m trying to install a modpack onto my server called ‘Roguelike Adventures and Dungeons 2’ I followed the same process I did for other modpacks I’ve succesfully installed that ran on Fabric instead of Forge. I start a new instance, I configure the minecraft settings to match the forge version of the modpack I’m trying to install, I then add the server download zip into the file manager, extract and try to start the server which results in an error message stating:

Unable to start server.

The Minecraft server stopped within 5 second of starting, this is not a fault with AMP - you should check your Minecraft servers log files to find out why it is unable to start.

Which I have never seen before but I follow the instructions and look at the logs but to my knowledge they don’t state anything that could be classed as the reason the server is failing to start.

The debug log shows:

[16May2025 15:09:53.460] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.2.39, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, nogui]
[16May2025 15:09:53.463] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.1.3+8.1.3+main-8.1.x.c94d18ec starting: java version 21.0.7 by Eclipse Adoptium
[16May2025 15:09:53.481] [main/DEBUG] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Found launch services [minecraft,testharness,fmlclient,fmlserver]

The latest log shows:

[16May2025 15:09:53.460] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--gameDir, ., --launchTarget, fmlserver, --fml.forgeVersion, 36.2.39, --fml.mcpVersion, 20210115.111550, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, nogui]
[16May2025 15:09:53.463] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.1.3+8.1.3+main-8.1.x.c94d18ec starting: java version 21.0.7 by Eclipse Adoptium

I then tried submitting a ticket through AMP to get help with this problem which again did not work, the submit ticket button just wasn’t working. I tried searching up if anyone else has had a similar problem and only found one post where the reply was to press F12 and check for errors which I did and managed to find some.

These errors were:

Uncaught (in promise) TypeError: this.postTitle is not a function
    at NewTicketVM.createTicket (AMP.js?v=2.6.1.6:2972:18)
    at HTMLButtonElement.<anonymous> (knockout-3.5.1.js:100:264)
    at HTMLButtonElement.<anonymous> (knockout-3.5.1.js:16:93)
    at HTMLButtonElement.dispatch (jquery-3.6.0.min.js:2:43064)
    at v.handle (jquery-3.6.0.min.js:2:41048)

Uncaught (in promise) Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received

Uncaught (in promise) TypeError: this.postTitle is not a function
    at NewTicketVM.createTicket (AMP.js?v=2.6.1.6:2972:18)
    at HTMLButtonElement.<anonymous> (knockout-3.5.1.js:100:264)
    at HTMLButtonElement.<anonymous> (knockout-3.5.1.js:16:93)
    at HTMLButtonElement.dispatch (jquery-3.6.0.min.js:2:43064)
    at v.handle (jquery-3.6.0.min.js:2:41048)
NewTicketVM.createTicket @ AMP.js?v=2.6.1.6:2972
(anonymous) @ knockout-3.5.1.js:100
(anonymous) @ knockout-3.5.1.js:16
dispatch @ jquery-3.6.0.min.js:2
v.handle @ jquery-3.6.0.min.js:2

Steps to reproduce:

  • Start new instance.

  • Confgure settings (Allow flight, Ram 8192mb, 2 Max players, Sleep mode Off, Difficulty Hard, World Type biomesoplenty, Server Jar on Autoselect, Release stream Stable,)

  • Choose correct server type and Forge version i.e. Forge, Forge version 36.2.39, Minecraft version 1.16.5

  • Add modpack files into file manager

  • Try to start server

Actions taken to resolve so far:

  • I have tried starting the server without the modpack files on a new instance and got the same results. So I belive the issue is to do with forge and my Ubuntu server rather than the modpack itself.

  • I have tried installing an older version of Java onto the ubuntu server following some advice I found in a different forum stating Minecraft 1.16.5 has certain issues with different java version but still nothing changed.

  • I have also tried starting new instances and still nothing.

I will also state that I am new to linux/Ubuntu, server making, and AMP so I apologise if I’m doing something fundemantally wrong or misunderstanding what it is I’m supposed to do, I hope this is an easy fix and that I hear back from someone soon.

Thank you for your time.

2

You need to use Java 8 or Java 11 with Forge 1.16.5. (you need to select it in the web UI, Java doesn’t automatically use the right one)
https://discourse.cubecoders.com/t/setting-up-a-modded-java-minecraft-server/26535#p-50642-h-4-additional-java-information-43

3

Ahhh thank you, I managed to find the setting to change the java version. I thought all i had to do was install it works without any problems now, thank you! :slight_smile:

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