Добавлен заголовок с Content-Type

src/App.js

@@ -13,19 +13,20 @@ import { PrivateRoute } from './components/Private'
 
 //OpenAPI.BASE = 'http://localhost:3000'
 OpenAPI.TOKEN = localStorage['token']
+OpenAPI.HEADERS = {'Content-Type': 'application/json'}
 
 export default function App() {
   return (
     <ConfigProvider locale={locale}>
       <Router>
         <Switch>
-          <Route path="/login">
+          <Route path={'/login'}>
             <Login />
           </Route>
-          <Route path="/register">
+          <Route path={'/register'}>
             <Register />
           </Route>
-          <PrivateRoute path="/">
+          <PrivateRoute path={'/'}>
             <Main />
           </PrivateRoute>
         </Switch>