Trouble with mavproxy on rpi

I am running latest version of PX4 on quad with a raspberry pi4 companion computer. I updates all libs and software on pi. Mavproxy appears to initiate properly; however, I am unable to change flight modes. The mavproxy session is as follows (how can I resolve this problem):

pi@raspberrypi:~ $ python3 ./.local/bin/mavproxy.py --master=/dev/ttyAMA0 --out 127.0.0.1:14550 --out 127.0.0.1:14551 --out=udpout=0.0.0.0:14550

Connect /dev/ttyAMA0 source_system=255

Log Directory:

Telemetry log: mav.tlog

Waiting for heartbeat from /dev/ttyAMA0

MAV> Detected vehicle 1:1 on link 0

online system 1

MANUAL> Mode MANUAL

fence breach

MANUAL> mode STABILIZED

MANUAL> ERROR in command [‘STABILIZED’]: required argument is not a float

MANUAL>