CBX021: casebox.yml cannot be read
This page says what CBX021 means and how you fix it.
What happened
Section titled “What happened”.casebox/casebox.yml is not valid YAML, or a value has the wrong type.
What to do
Section titled “What to do”Fix the file at the line the message names. Editors that load the JSON Schema of casebox.yml show the error as you type.