Startup Issue with Minecraft - Server says, "Unable to Run"

Technical Support
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1

System Information

Field Value
Operating System Linux - CentOS Stream 9 on x86_64
Product AMP ‘Callisto’ v2.5.1.4 (Mainline)
Virtualization QEMU_KVM
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Failed

Problem Description

Issue

FTB app says that the server is running version 1.21,FTB Revalation is only version 12.2.
I cannot find a way to change the version in AMP that will allow the server to work with 1.12.2

Reproduction Steps

  • Ran vanilla
  • Installed FTB Revalations
  • Tried to connect, version mismatch.
  • removed Versions folder
  • Console still says its using 1.20
  • Cannot start server
2

You need to install the modpack, then set the correct modloader (server type), version, and Java runtime version.
The FTB installer currently has no knowledge of what MC version/modloader to run the server with, so the extra step is required.

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