Sorry for the late response. I provided the Linux version I used for SteamDeck compatibility as-is but don't have a way to test it myself, as I don't use Linux. I couldn't find anything helpful searching your error code or the 'permission denied' bit.
I'll add a notice to the Itch page for others so they don't make an accidental purchase. Itch offers a refund policy if you contact them directly. If I can offer anything else as compensation for the trouble, let me know. Sorry :/