Are you using the itch app? Or did you download the Mac version manually here on itch from the game page?
Did you unpack the fiels from the .zip container? The error message is usually different, but some people get problems on Mac when they don't unpack the game using the "The Unarchiver" app. Maybe that could help.
In case that the download here on itch causes you problems, you can also get the newest Mac version here: https://mega.nz/file/eloxWY5Z#QFDho4oELKNfzVp7AOB1OVB_nQirxLNxXLK0mIQtnrs