The socket/serialproxy is closed

Hello, I have to connect mission planner to a beaglebone blue by UDC on my computer but it doesn’t work and it returns “The socket/serialproxy is closed”.But it works on the laptop of my friend whereas I do the same as him and he can’t explain why. Does somebody have an idea please ?

check your windows firewall settings.

I disabled it but it still not works…

what version is your friend running? and what version are you running?

also how are you connecting? udp or tcp?

Now it works but i have to lauch apm planner first and reboot the beaglebone blue