This time I got this error when itch ran the run.sh file: "./tales.x86_64: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by ./tales.x86_64)"
And unlike FMOD I'm not familiar at all with what it's asking for this time. My guess is that it's the GNU C Library which is a completely different runtime than... normal C I guess. I'm not sure.
https://unix.stackexchange.com/questions/522076/glibc-2-29-can-not-be-found-for-...
https://packages.debian.org/search?keywords=glibc
I am surprised though that itch recognizes and allows bash files to run lmao. That could be dangerous if someone malicious just uploaded bash code that destroyed your system or something. Maybe it's not that serious though because running executables can be done outside of root.
I'm definitely willing to check and make sure until I can get a version to run. I have to go to bed soon but I'd love to help you solve this if possible.