I tried to work a little bit with the terminal. From the root I tried following commands
Franks-MacBook-Air:/ frankstrobel$ cd Volumes/Macintosh\ HD
Franks-MacBook-Air:Macintosh HD frankstrobel$ cd Users/
Franks-MacBook-Air:Users frankstrobel$ cd frankstrobel/
Franks-MacBook-Air:frankstrobel frankstrobel$ cd Desktop/
Franks-MacBook-Air:Desktop frankstrobel$ ls
In the end I get the message, that the "ls" operation is not permitted (See also attached picture)
Why I cannot use the ls command when I am in the desktop folder. This is the normal folder where I have all my files.
MacBook Air 13″, macOS 10.15