IMPORTANT: When transferring the scenario files to your server via FTP, set the transfer mode to "binary" in your FTP client to avoid various error messages with weapon effects.

To set up Project Eden or Reforged Eden on a dedicated server see the Project Eden Configuration Guide here:
https://steamcommunity.com/sharedfiles/filedetails/?id=1703779262
The folder where Project Eden 1.5 is in is called 2464519802.
Clients connecting to your server do not need to be subscribed to the scenario. They will download all required files automatically.

It uses a similar game options file as the Default Survival game, optimized for single player or coop. If you are running this on a server it's recommended that you edit the gameoptions.yaml file as needed, or use EAH (Empyion Admin Helper) to configure your server.
I cannot offer assistance in this, as this is a file that you configure for your own needs.

Project Eden has an in-game admin control for additional scenario specific settings related to progression and missions here:
https://steamcommunity.com/sharedfiles/filedetails/?id=2274073572


If you are using a rented server host you will need to contact their support for assistance.
Project Eden and Reforged Eden is not compatible with some server hosts such as Nitrado.

I cannot offer individual assistance in setting up or configuring a server beyond what I have posted in the guide linked above.

For general server setup assistance not related to the scenario:
Discord: https://discord.gg/empyrion
Forums: https://empyriononline.com/forums/
Steam Discussions: https://steamcommunity.com/app/383120/discussions/
Empyrion Admin Helper: https://empyriononline.com/threads/tool-eah-empyrion-admin-helper-v1-55-x.5771/

Project Eden and Reforged Eden is more demanding on servers than the default game.