Invariant Violation: You should not use outside a

Question

I have a problem that I don\'t know how to solve, I get this error when running npm test

Invariant Violation: You should not use

Answer 1

Error: Invariant failed: You should not use ,, outside a [enter image description here][1]

[Error: Invariant failed: You should not use ,, outside a  ][1]

 1. Open Index.js or Index.jsx
 2. add-> import { BrowserRouter } from "react-router-dom";
 3.Rap  in  and  
should  look like :
ReactDOM.render(
  
    
      
    
  ,
  document.getElementById("root")
);