photobooth: Pi Camera does not work

Hi, i have the following problem at taking Photo:

I am using the followinig hardware/software

• PI 4 with 4 GB Ram
• PI Camera v2
• Chrome Browser at the PI
• Photobooth is the actuall one. I downloaded it a hour before from here

Worked it? It never works.

What i tried

1. If i use this sudo raspistill -n -o $(date +%s) | echo "Done" at shell i take a image and earn the Message done.

2. i use the command without sudo --> same error (in shell and it the config.php)

in my.config.inc.php i got the following one:

array ( 'cmd' => 'sudo raspistill -o $(date +%s).jpg -q 100 -t 1 | echo "Done"', 'msg' => 'Done' , ) , );