can't route successfully between components in react app - reactjs

Question

I have a static react app (that means there is not server side rendering) located under example.com/web-class.gr. My problem is that I can't route between components when I use my sidebar menu.
For instance. When I navigate to example.com/web-class.gr/css-intermediate the page loads as expected. From now on if I navigate to different lessonName the page is loading as expected. But I also have exercises, which I can't load when I press the corresponding button in my menu. To get an idea this is my index.js file:
import React from 'react';
import { Link as ReactLink } from 'react-router';
import sidebarStore from './Sidebar/SidebarStore';
import lessonValues from '../../lessonValues';
import LessonStore from '../../LessonStore';
import SidebarLink from './Sidebar/SidebarLink';
export default class Sidebar extends React.Component {
constructor() {
super();
this.state = {
SidebarIsCollapse: sidebarStore.getCurrentState()
}
this.NavMdPlaceholderClass = 'hidden-xs col-sm-4 col-md-3 col-lg-3';
}
componentWillMount() {
sidebarStore.on('change', () => {
this.setState({ SidebarIsCollapse: sidebarStore.getCurrentState() });
this.ChangeSidebarState();
});
this.RenderMainMenu();
}
ChangeSidebarState() {
const NAV_DefaultClasses = "col-sm-4 col-md-3 col-lg-3 ";
if (this.state.SidebarIsCollapse) {
this.NavMdPlaceholderClass = NAV_DefaultClasses + "slideInLeft";
} else {
this.NavMdPlaceholderClass = NAV_DefaultClasses + "slideOffLeft";
}
}
RenderMainMenu() {
this.main_menu = [];
for (let link of lessonValues) {
let { Id, url, isExercise, title } = link;
this.main_menu.push(<SidebarLink key={Id} url={url} isExercise={isExercise} title={title}/>);
}
}
render() {
return (
<div class={this.NavMdPlaceholderClass} id="nav-md-placeholder">
<nav id="sidebar">
<ul id="main-menu">
<li class="ripple-btn">
<ReactLink to="/" onClick={this.SetLessonDetails.bind(this)}>
<span class="item-align-fix">
<i class="glyphicon glyphicon-home" style={{'marginRight': '10px'}}></i>
<strong>
<span>AΡΧΙΚΗ</span>
</strong>
</span>
</ReactLink>
</li>
{this.main_menu}
</ul>
</nav>
</div>
);
}
}
here is the SidebarLink component file:
import React from 'react';
import LessonStore from '../../../LessonStore';
import { Link as ReactLink } from 'react-router';
export default class SidebarLink extends React.Component {
SetPageTitle() {
LessonStore.setLesson(this.props.url);
}
render() {
let glyphoconType = 'glyphicon ';
glyphoconType += this.props.isExercise ? 'glyphicon-pencil' : 'glyphicon-ok-sign';
glyphoconType += ' nav-ico untaken-lesson';
return (
<li class="ripple-btn">
<ReactLink to={this.props.url} onClick={() => this.SetPageTitle()} >
<span class="item-align-fix">
<i class={glyphoconType}></i>
<span>{this.props.title}</span>
</span>
</ReactLink>
</li>
);
}
}
But if I refresh the page manually, I am able to reveal the exercise page. But now I can't navigate to any other element. Only if I click it in sidebar menu and manually refresh the page.
To sum up:
The lessons are loading dynamically. I can navigate between them.
I can't navigate to exercises. Only if I click the corresponding exercise and hit the refresh button.
If I'm viewing an exercise (eg exercise-1), I am not able to navigate to any other component.
I use nginx and below is my rule for the project:
location ^~ /web-class.gr/ {
try_files $uri $uri/ =404;
if (!-e $request_filename){
rewrite ^(.*)$ /web-class.gr/index.html break;
}
}
And lastly here is my sidebar component:
import React from 'react';
import { Link as ReactLink } from 'react-router';
import sidebarStore from './Sidebar/SidebarStore';
import lessonValues from '../../lessonValues';
import LessonStore from '../../LessonStore';
import SidebarLink from './Sidebar/SidebarLink';
// some other helper functions here
render() {
return (
<div class={this.NavMdPlaceholderClass} id="nav-md-placeholder">
<nav id="sidebar">
<ul id="main-menu">
<li class="ripple-btn">
<ReactLink to="/web-class.gr/" onClick={this.SetLessonDetails.bind(this)}>
<span class="item-align-fix">
<i class="glyphicon glyphicon-home" style={{'marginRight': '10px'}}></i>
<strong>
<span>AΡΧΙΚΗ</span>
</strong>
</span>
</ReactLink>
</li>
{this.main_menu}
</ul>
</nav>
</div>
);
Is there any problem with ReactLink to? On my apache machine all works as expected. I can't figure out why my program breaks.
Update
I provide the link of the site to help your job become easier. The site is in greek although I believe you can understand it's structure.
web-class.gr
Code on Github

Answer 1

This One worked For me
NB
for React Router
use <BrowserRouter> tag only once to enclose the whole of your application.
Use this tag at the point of Rendering.
For Example
If you are using Create-React-app .Use this at your Index.js file
ReactDom.Render(<BrowserRouter><App/></BrowserRouter>)

Answer 2

Second Update:
Change your render code in react/index.js to
ReactDom.render(
<Router history={browserHistory} >
<Route path="/" component={Layout} >
<IndexRoute component={Index} ></IndexRoute>
<Route path="/exercise-1" name="exercise-1" component={Exercise1} ></Route>
<Route path="/exercise-2" name="exercise-2" component={Exercise2} ></Route>
<Route path="/exercise-3" name="exercise-3" component={Exercise3} ></Route>
<Route path="/exercise-4" name="exercise-4" component={Exercise4} ></Route>
<Route path="/exercise-5" name="exercise-5" component={Exercise5} ></Route>
<Route path="/exercise-6" name="exercise-6" component={Exercise6} ></Route>
<Route path="/:lessonName" name="lesson" component={Lesson} ></Route>
<Route path=":lessonName" name="lesson" component={Lesson} ></Route>
</Route>
</Router>
,app);
i..e the path starts with /