Error starting server

MMarmz · 10 Mar

i have installed version base of MMORPG branch:

sandro@elitebook:~/Scaricati/my-rpg-game$ npm run dev

> dev
> rpgjs dev

file:///home/sandro/Scaricati/my-rpg-game/node_modules/@rpgjs/compiler/lib/serve/index.js:22
    (_a = process.env).VITE_GAME_URL ?? (_a.VITE_GAME_URL = `http://localhost:${options.port}`);
                                      ^

SyntaxError: Unexpected token '?'