Mavproxy doesn't start when i try to run sitl

Ground Control Software MAVProxy
1

Here is my problem.

sss
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2

Did you run as root? Is there proper permission allocation for mavproxy?

When start sim
sudo python3 /home/user/ardupilot/Tools/autotest/sim_vehicle.py -v ArduCopter
There is no need for mavproxy, the sim itself is only required.