Minecraft - Undefined error when uploading

System Information

Field Value
Operating System Linux - Debian GNU/Linux 12 on x86_64
Product AMP ‘Callisto’ v2.5.0.14 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Solved - Used SFTP

Task

Trying to upload the mods for my server

Problem Description

Issue

I have tried many different files, they all are not able to upload

Reproduction Steps

  • click on manage on the depths of madness instance
  • click on file manager, and navigate to the mods folder
  • upload a mod by dragging and dropping a .jar file

Use the SFTP option for uploads rather than the browser upload.

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