Pixhawk 2.4.8 not calibrating escs after 4.4.4 flash

I flashed my pixhawk 2.4.8 to 4.4.4 quadcopter and now I can’t calibrate these, even tried new hobbywing ESC, no luck, tried everything including reflashing, was working fine in 4.4.1 but now mission planner won’t even flash the legacy firmware, Need help