Try to add a Social Media block to any page in the editor and it will crash, I see the following in the console: 

_{Warning: React.createElement: type is invalid – expected a string (for built-in components) or a class/function (for composite components) but got: undefined. You likely forgot to export your component from the file it's defined in, or you might have mixed up default and named imports.}

_{Check the render method of `SocialMediaEditor`.}