Could you copy and post the full output of running the command and the commands themselves as executed.It’s impossible to know which directory cannot be found, and the context of that error.
Did you correctly install all the software code for the PiDog? Was the installation process smooth? If there were any errors, please provide us with a screenshot of the error messages.
After running the example, please share a screenshot of the error information that appeared so we can analyze and resolve the issue.