Jetson nano kit with px4

how are you
first i try to connect my px4 with jetson nano kit:
i try:
first i connect my jetson with my pc with ssh connecting
2 … i check my mission planner sitting:
i will send picture…
then i check ( sudo cat /dev/ttyTHS1) to check if nano and px4 in connection with telem2( picture 2)
then i install python3
then i install mavproxy( here the problem)
after i install i try run it …
i connect my px4 with mission planner (install in pc) with USB (picture3)
then i run and i see this(edited)

then I try connect with USB

any idea please