NVIDIA Jetbot is not moving using /cmd_vel

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Hello. I have tried to move real Jetbot using ROS terminal commands, but they do not work.

I'm using remote control with SSH, and the connection is stable when I'm using gmapping and laser_scan_matcher for scanning and saving map. But when I tried to use move_base with rviz, it didn't work on a real robot.

I've used NVIDIA's tutorials on Jupyter Notebook to see if its motors problem, but it actually worked and Jetbot moved using robot.forward/backward etc. commands

Then I used $rostopic echo /cmd_vel to see if /cmd_vel atleast receives messages, I typed in a new terminal

$rostopic pub /cmd_vel geometry_msgs/Twist "linear:
      x: 0.0
      y: 0.0
      z: 0.0
    angular:
      x: 0.0
      y: 0.0
      z: 0.5

and the terminal with echo got the message, still no motor movement.

Can someone please explain why it isn't working? Ubuntu 18.04, ROS melodic