Still anyone using Linux?

I’m trying to run it on Steam installed via Flatpak on x86_64 with no luck. This is the terminal output:

https://paste.sr.ht/~whynothugo/4cd96a770acc16eaa2ef15176f0c1dcdfffa3234

I’d love to know how all that differs from the output of a successful run. A comparison would help me narrow down the root of the issue amongst all this noise.