subprocess.CalledProcessError: Command '['ninja', '-v']' returned non-zero exit status 1.

This error message indicates that a subprocess (a command executed by another program) has failed to complete successfully. Specifically, the command "ninja -v" has returned a non-zero exit status of 1, which usually means that an error has occurred.

To diagnose and fix the problem, you may need to look at the specific output and error messages generated by the "ninja" command. You can also try running the command again with additional debugging options (such as "-d debug") to get more information.

Possible causes of this error include incorrect command parameters, missing dependencies, or configuration issues with the program or system. You may need to consult the documentation or support resources for the program you are using to determine the root cause of the error.