Startup Issue with Minecraft - Server missing file, prevents server from starting

Technical Support
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1

System Information

Field Value
Operating System Linux - Ubuntu 24.04.3 on x86_64
Product AMP ‘Phobos’ v2.6.3.2 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Failed

Problem Description

Issue

I’m trying to setup a stoneblock 4 server using the FTB new source, but the server wont start and give the following message “The update manager reported a successful update, but ./Minecraft/minecraft_server.jar is missing.” cant figure out how to make the server run correctly.

Reproduction Steps

  • configured server to FTB stoneblock 4 server
  • installed the files and adjusted server RAM and max players
  • attempted to start the server, received “The update manager reported a successful update, but ./Minecraft/minecraft_server.jar is missing.”
  • tried to convert server to neoforge 21.1.213 for a matching server version, server started
  • world is a vanilla world
2

Odds are the world loaded as vanilla at some point, in which case you’ll need to delete the world folder.
Check out this guide here on how to properly configure things: