ramses doesn't compile under Ubuntu 22.04, because of a new little bug in the external library Abseil with the new glibc version, which has been fixed by Abseil team already.
Quick-fix
Just add template parameter <size_t> to std::max in:
external/abseil/absl/debugging/failure_signal_handler.cc:128
References
Issue: abseil/abseil-cpp#952
Fix: abseil/abseil-cpp#967