The error seems to be coming from a file that is not part of the game's code (JoiMZ.js) This is probably coming from JoiPlay, which you might be using to load the game on phone?
Although we do not officially support smartphone versions, I have seen screenshots of people successfully using an emulator. Maybe someone else might be able to answer your question. 🤔(If no one answers here, maybe you can try asking on our Discord server.)
Note that RPG Maker MZ allows mobile exporting, but there's no guarantee if it'll work correctly on phones especially if the plugins use special keys (which The Legacy of Hedonia uses). One thing to note is the screen size as most RPG Maker games are designed for computers which is OK playing on a laptop or monitor, but tiles and interface elements can appear too small on a phone at least on 1280x720 rather than the default resolution.
