Trouble with Installation on Hetzner CPX Instance

Hi all, I’m in the process of migrating my Plex instance from my home server to a Hetzner cloud instance. I’ve been struggling for the past few days, and I’ve run out of ideas. Any help would be greatly appreciated!

System Information

Server Version#: 1.42.2
OS: Ubuntu 24.04
Cloud Provider: Hetzner CPX21

Issue

After logging into the web application and upon clicking “Next” after naming my server. I’m met with the following errror.

Reproduction

Begin with a new server. UFW is running with the plexmediaserver application (below) allowed. Follow the instructions in this guide: Install and Configure Plex Media Server on CentOS 8 .

[plexmediaserver]
title=Plex Media Server (Standard)
description=The Plex Media Server
ports=32400/tcp|3005/tcp|5353/udp|8324/tcp|32410:32414/udp

[plexmediaserver-dlna]
title=Plex Media Server (DLNA)
description=The Plex Media Server (additional DLNA capability only)
ports=1900/udp|32469/tcp

[plexmediaserver-all]
title=Plex Media Server (Standard + DLNA)
description=The Plex Media Server (with additional DLNA capability)
ports=32400/tcp|3005/tcp|5353/udp|8324/tcp|32410:32414/udp|1900/udp|32469/tcp

Things I’ve Tried

  • Claim Plex server manually using: How to Claim Your Plex Server - Plexopedia
    • This results in the server showing up under my accounts, however I get the error “Can’t connect to server securely”
  • Disable firewall (just in case)
  • Accessing Plex Media Server web interface through private browser (clearing site data)

Logs

Plex Media Server.log (912.6 KB)

Last I checked they blocked the use of Hertzner servers.