could you explain in more depth?
There will be a folder in the game labeled "www" and a file called "package.json" these are the actual unique parts of the game, everything else is the default RPGMaker files, which are really just a program called NWSJ.
The bug is because of the version of RPGMaker the game downloads with, so you can fix it by just moving the above folder & file to an updated NWSJ set up, which you can get just by having some other RPGMaker game installed. Just make sure to remove THAT game's "www" and "package.json" first