name 'zio' is not defined

The error message "name 'zio' is not defined" means that you are trying to use the variable or function named "zio" in your code, but it has not been defined or declared before that point.

You need to make sure that you have defined or imported the variable or function named "zio" before using it in your code. Alternatively, check for any typos or spelling mistakes in the variable or function name.