Wornning and errors (such as Could not initialize SDL: No available video device) when run UE4Editor on Ubuntu headless remote server with nvidia card

hi,
i remotely run headless ubuntu server (20.04) with Nvidia card (driver 495.44 is installed).
when i run ./UE4Editor, the output:
warning:
LogInit: Warning: Could not initialize SDL: No available video device
LogInit: Warning: FDisplayMetrics::GetDisplayMetrics: InitSDL() failed, cannot get display metrics
LogInit: Warning: FLinuxSplashState::InitSplashResources() : InitSDL() failed, there will be no splash.
LogInit: Warning: Could not initialize SDL: No available video device
LogInit: Error: FLinuxApplication::CreateLinuxApplication() : InitSDL() failed, cannot create application instance.

can anyone please help me out? thanks in advance