Pi camera v2 not recognized by the Pi 4 (and octoprint)

Pi Camera v2

camera won't work, even not recognized via putty

update octopi file with camera_raspi_options="-x 1280 -y 720 -fps 20". tried to reverse the cable in one one, other end, both sides

pi@octopi:~ $ lsusb
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub

Bus 001 Device 003: ID 1eaf:0004
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
pi@octopi:~ $ /var/log/webcamd.log
-bash: /var/log/webcamd.log: Permission denied**
(/var/log/webcamd.log, syslog, dmesg, ... no logs, no support)
Additional information about your setup (OctoPrint version, OctoPi version, ...)

thanks all