Error ouccurred at ros2 launch ld06.launch.py

[Hermanye996]

[ERROR] [ldlidar_stl_ros2_node-1]: process has died [pid 7791, exit code 1, cmd '/home/mangdang/ldlidar_ros2_ws/install/ldlidar_stl_ros2/lib/ldlidar_stl_ros2/ldlidar_stl_ros2_node --ros-args -r __node:=LD06 --params-file /tmp/launch_params_4jbfaw75 --params-file /tmp/launch_params_gydxgavv --params-file /tmp/launch_params_bybutd2d --params-file /tmp/launch_params_b4orcomy --params-file /tmp/launch_params_1yr3i283 --params-file /tmp/launch_params_m3umg0fo --params-file /tmp/launch_params_lwbet75o --params-file /tmp/launch_params_5ss3a7t9 --params-file /tmp/launch_params_u6ozj208'].

I've finished all steps in README, and tried sudo chmod 777 /dev/ttyUSB* chmod result:

ls -l /dev/ttyUSB0 
crwxrwxrwx 1 root dialout 188, 0  3  7 13:53 /dev/ttyUSB0