Hello!. I have the same problem (I'm in RPG Maker MV). Where I should download the updated plugin? I had done it here and in the bundle page, but I still have the same problem. Non of the other plugins of the series give be the error, on the contrary, they all work perfectly!
I uploaded another fix just a moment ago, please try again.
You can download from the bundle's page or the single menu editor page. In both cases, itch.io fetches the plugin from my webspace, so it makes no difference for you :)
