Hello. I recommend that you verify that you have NW.JS in the specific version required to use this plugin. Since other versions can cause unexpected Problems like the one you mention.Additionally, I suggest that you use this system, which is newer and has new functions:
https://rabbitteaparty.itch.io/nekogakuen-steamworksapi
Please check:
- Have RPG MAKER MZ Updated to the latest version (I use 1.7.0)
- Have NW (The engine in which the rpg maker mz games run) in a version compatible with Steam Greenworks. As far as I understand, only 2 versions are supported. I recommend you use the version:
nw.js v0.49.2 which is the newest supported version. If you don't know how to update the version of your nw, you can follow this simple guide:
https://forums.rpgmakerweb.com/index.php?threads/how-to-update-nw-js-to-dramatic...
(Note that you may also need to download versions of "Greenworks.js" and "greenworks-win64.node" compatible with version 0.49.2 and replace them with the ones from the Steam Link demo)
- Make sure all files are properly unzipped.
All the best!
Greetings.