Webcam detection on Pi

In the Printer Settings - Webcam screen the webcam is greyed out and not selectable.
"USB Composite Device: DV20 USB on port 8080"

lsusb

Bus 001 Device 007: ID 4c4a:4a55 Jieli Technology USB Composite Device

root@pi:/usr/local/Repetier-Setup/bin# sh -x ./startAllCams
./startAllCams: 5: Bad substitution

DIR=
cd
pwd
DIR=/usr/local/Repetier-Setup/bin
echo Start from directory /usr/local/Repetier-Setup/bin
Start from directory /usr/local/Repetier-Setup/bin
killall -q -9 watchedCam
killall -q -9 watchedPiCam
killall -q -9 /usr/local/bin/mjpg_streamer
sleep 2
. ../etc/webcam.conf
WEBCAM_FRAMERATE=1
WEBCAM_WIDTH=160
WEBCAM_HEIGHT=120
WEBCAM_QUALITY=85
WEBCAM_PICAM_PARAMS=
WEBCAM_USB_PARAMS=
IS_PI=yes
MJPG_STREAMER=/usr/local/bin/mjpg_streamer
MJPG_PLUGIN_DIR=/usr/local/lib/mjpg-streamer
MJPG_WWW_DIR=/usr/local/share/mjpg-streamer/www
WEBCAM_DIR=/dev/v4l/by-path/*
./startAllCams: 21: Syntax error: redirection unexpected

Grey means was seen but currently not running. Seeing the errors in startAllCams I think it comes from this.

Running it with sh might be the problem you see here. sh must be bash, e.g. line 5 wth the error has

DIR="$(dirname "${BASH_SOURCE[0]}")"

which works only in bash.