You can’t buy ERLC gamepasses from inside a private server itself. The wiki says private-server purchases don’t save properly there, so you should buy the gamepass from a public server or the game’s normal store/menu instead.

How it works

  • Join a public ERLC server.
  • Open the game’s menu and go to the gamepasses or server/upgrade section.
  • Purchase the pass there, then it should apply to your account and carry into your private server where supported.

Private-server upgrades

ERLC also has separate private-server upgrade packs, and those are bought through the Owned Servers tab by selecting your server and pressing Upgrade. A Reddit discussion also lists several private-server packs and notes that the total cost for a full server setup can add up quickly.

Important note

If you tried to buy a normal gamepass while already in a private server, the purchase may fail to save or may not grant the item correctly. So the safest path is: buy it in a public server, then use it in your private server.

TL;DR

You generally cannot buy a normal ERLC gamepass directly in a private server ; buy it in a public server or through the proper upgrade menu for private-server packs.