Could not initialize SDL: XRandR support is required but not available

[UPUPGOO]

LogInit: Warning: Could not initialize SDL: XRandR support is required but not available LogInit: Error: FLinuxApplication::CreateLinuxApplication() : InitSDL() failed, cannot create application instance. LogLinux: FLinuxPlatformMisc::RequestExit(bForce=true, ReturnCode=1) LogLinux: FLinuxPlatformMisc::RequestExit(1)

When I run AirSimNH.sh, errors occured.[https://github.com/Microsoft/AirSim/releases] So what can I do? Thank you for your answer.