Startup Issue with Project Zomboid - Steam CMD Login isn't working

System Information

Field Value
Operating System Linux - Ubuntu 24.04.3 on x86_64
Product AMP ‘Phobos’ v2.6.3.2 (Mainline)
Virtualization QEMU_KVM
Application Project Zomboid
Module GenericModule
Running in Container No
Current State Stopped

Problem Description

Issue

Do i have to use my regular steam password? i definetly used the right password i even copy pasted it once to log into steam and i tried the same one here. I tried using my permanent steam username, my display name, my email adress everything. I have steamguard and im trying to run a official beta branch of the game (Build ID 21238927). No mods or anything of that nature.

Reproduction Steps

  • Start server
  • login screen appears
  • entered steam login credentials
  • after a few seconds the login window reappears

Specify the branch name, not the build ID

It is 42.13.1. I input the Build ID into where you put the Beta version in the Updates section, not the branch name.