What do the "internal logger errors" in the ErrorOutputPaths description mean?

[baihongru]

type Config struct {
	// ErrorOutputPaths is a list of URLs to write internal logger errors to.
	// The default is standard error.
	//
	// Note that this setting only affects internal errors; for sample code that
	// sends error-level logs to a different location from info- and debug-level
	// logs, see the package-level AdvancedConfiguration example.
	ErrorOutputPaths [][string](https://pkg.go.dev/builtin#string) `json:"errorOutputPaths" yaml:"errorOutputPaths"`
}

Hello everyone, I would like to know what "internal logger errors" in the above document means?

Can the error generated by logger.Sugar().Infow("message", 0, 1) be regarded as an internal error? Can you provide an example of outputting information to "ErrorOutputPaths"?