Can't run KH3 (Epic Games version) on Steam Deck... running into 'fatal error'

I downloaded Kingdom Hearts 3 on my Steam Deck through Heroic Launcher. Every time I try to boot up the game, whether it's through game mode or Desktop mode, the screen turns black and I get an error window that just says "Fatal Error"....

Can anyone help me get this game running? It's the official version through the Epic Games store.

LOG: https://0x0.st/8JdZ.log