invalid_option

Invalid option specified for '{0}': {1}

The analyzer produces this diagnostic when an option is specified and the value of the option is invalid.

The following code produces this diagnostic because fail isn't a valid severity for a diagnostic:

// %uri="analysis_options.yaml"
analyzer:
  errors:
    dead_code: fail
    prefer_single_quotes: warning

If you specify the option, provide a valid value for it:

// %uri="analysis_options.yaml"
analyzer:
  errors:
    dead_code: error
    prefer_single_quotes: warning

If you don't need the option, remove it:

// %uri="analysis_options.yaml"
analyzer:
  errors:
    prefer_single_quotes: warning