Fix: Improve error message about react-docgen cannot parse source
Fix: Improve error message about react-docgen cannot parse source

styleguidist/react-styleguidist,styleguidist/react-styleguidist,styleguidist/react-styleguidist,bluetidepro/react-styleguidist,sapegin/react-styleguidist,sapegin/react-styleguidist