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It could be I suppose, I don't know how Elementary differs from Ubuntu. It's interesting that the itch app also has the same problem, and it does hint at a problem at the OS level. My googling turned up a thread about somebody trying to run another application on Elementary and having the same problem, even though the files were definitely there in that case as well: https://forum.teamspeak.com/threads/109455-Elementary-OS-bash-ts3client_linux_x8...

Unfortunately that was unresolved, and I haven't seen anything else that might explain what's going on. I will see if I can install Elementary in a virtual machine and reproduce the problem.

I assume you have not had this issue with other games?