how did you compile?
using conan/pmm or ror-depedencies? in the first case you need to run it from the bin folder
also why not just use the precompiled linux zip?
i compile and use RoR under Arch using ror-depedencies just fine
rename your .rigsofrods dir (in your home) and run ror fresh
how did you install ror?
i have seen this error again when my bin/resourses were outdated iirc, so try downloading the zip from itch directly, extract, run ./RunRoR and check again
Try the latest dev build https://anotherfoxguy.itch.io/rigs-of-rods, also rename/remove your .rigsofrods dir and start RoR fresh. Switch to caelum in game settings. Post your RoR.log also
i dont think so