block3.

<Router>
       <PreferencesContext.Provider value={preferencesValue}>
         <Switch>
    <ProtectedRoute exact path="/room/:roomName" component={Wrapper} />
           <Route path="/room/:roomName/:conversationId/end">
             <EndCall />
           </Route>
           <Route path="/">
             <WaitingRoom />
           </Route>
         </Switch>
       </PreferencesContext.Provider>
     </Router>