We've noticed some issues with the glibc abi being different between linuces and so it doesn't seem to run on them; We're working on getting a flatpak put together to hopefully alleviate this problem on linux! Stay tuned it should be this week.
Hi! I'm happy to report we have likely fixed the bug you were experiencing, and also made the fit and finish a bit more user friendly. We've updated the download instructions with how to install ManyNames much more conveniently.