Hey, I don't want to sidetrack the issue, but the current version on Flathub is using an older runtime. As such, you can use it to run Zandronum on newer systems:
https://flathub.org/apps/details/com.za ... .Zandronum
That said, Newer builds also have this issue so if you could update the FMod dependency in the future, that would be great.