Found a fix for the issue - Arch Linux users should install the 'lib32-gconf' package from the Arch User Repository, and Debian/Ubuntu users should install the 'libgconf-2-4' package using apt. GConf is an old, outdated package that used to be a dependency for Chromium on Linux, and RPG Maker MV games are running through Chromium. Guess MV just never removed the dependency, or its using an old version of Chromium.
Also, the game should be launched with the "nw" executable, not the "Game" executable on Linux since for some reason that doesn't work
If neither of those work - download version 0.38.2 of NW.js (https://nwjs.io/blog/v0.38.2/) and drop all the files into the root of the Cerasus folder... NW.js version 0.38.2 specifically is apparently the best for Linux compatibility with RPG Maker MV games