Dronekit connection does no more work after update

Hello. I’ve been using for more than one year a quadcopter with the Cube Orange running Copter V4.0.7, running flawlessly together with dronekit on the raspberry pi connected to the Telem2 port using mavlink2 to get the telemetry.

However, I had to upgrade it to the 4.2.3, and dronekit does no more work, even the mavproxy doesn’t seem to work.

What’s our suggestion? I just need to get the telemetry data (attitude, speed, gps data) on the raspberry pi onboard of the drone connected to the Cube Orange.

Any idea?