When I try to launch a server it says 'could not downloadhttp://etc superpower.json'

This is my error message

07/12/2019 20:18:54 - The server crashed while loading project "2d-collision".
Error: The system game is not installed. Run "node server install game" to install it.
    at done (C:\Users\Fran\AppData\Roaming\Superpowers\core\server\ProjectServer.js:115:30)
    at fs.readFile (C:\Users\Fran\AppData\Roaming\Superpowers\core\server\ProjectServer.js:142:17)
    at FSReqWrap.readFileAfterClose [as oncomplete] (internal/fs/read_file_context.js:53:3)

I've tried reinstalling and deleting and redownloading the core files,

Not sure if this is post v6.0 , would really like to be able to open my projects, thanks !

Do you have the "game" system installed? If not, you can install it from the server settings tab in the main app.