Error in statring jmavsim in sitl

when i write the command :" ```
make px4_sitl jmavsim" this message shows to me “INFO [simulator] Waiting for simulator to accept connection on TCP port 4560” and no simulation starts. so what is the problem ? thanks in advance

@Khaled_Adel Your jmavsim is not starting. Have you followed exactly the PX4 documentation to install all the dependencies?

@Jaeyoung-Lim Yes i followed these instructions : Ubuntu/Debian Linux · PX4 Developer Guide at the first time. And after the problem appeared i followed the following video 💻 Setting up your PX4 development environment on Linux — Getting Started with Drone Development - YouTube which introduce the same previous instructions and the same problem excites.