moved request error out of show page state

react/components/ErrorPage/index.js

@@ -1,4 +1,5 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import NavBar from 'containers/NavBar';
 
 class ErrorPage extends React.Component {
@@ -15,7 +16,8 @@ class ErrorPage extends React.Component {
   }
 };
 
-// required props
-// error
+ErrorPage.propTypes = {
+  error: PropTypes.string.isRequired,
+}
 
 export default ErrorPage;