Expected behavior App was supposed to be showing something, anything...

Actual behavior It's blank, literally, just a blank page, no console error, no compilation errors

Resources (screenshots, sample code.) Here's my index.js

import React from 'react';
import ReactDOM from 'react-dom';
import { BrowserRouter, Route, Switch } from 'react-router-dom';
import '@fortawesome/fontawesome-free/css/all.min.css';
import 'bootstrap-css-only/css/bootstrap.min.css';
import 'mdbreact/dist/css/mdb.css';

// Components
import './index.scss';
import App from './components/App';
import ClientArea from './components/ClientArea';

ReactDOM.render(
    <BrowserRouter>
        <Switch>
            <Route path="/" exact={true} component={App} />
            <Route path="/clientArea" component={ClientArea} />
        </Switch>
</BrowserRouter>,

document.querySelector('#root'));

My app.js

import React from 'react';
import { MDBContainer, MDBRow, MDBCol } from "mdbreact";
import MenuBar from './MenuBar';
import About from './About';
import Solutions from './Solutions';
import Footer from './Footer';
import "../topBar.scss";
import "../mainPage.scss";

const App = () => {
    return (
    <div>
        <MDBContainer id="beginning" fluid>
            <MDBRow className="mainPage">
                <MDBCol>
                    <MenuBar />
                </MDBCol>
            </MDBRow>
        <MDBRow id="about" className="about overflow-hidden">
            <h1 className="title">Sobre</h1>
            <MDBCol>
                <About />
            </MDBCol>
        </MDBRow>
        <MDBRow id="solutions" className="solutions">
            <h1 className="title">Soluções</h1>
            <MDBCol>
                <Solutions />
            </MDBCol>
        </MDBRow>
    </MDBContainer>
    <MDBContainer fluid>
        <MDBRow id="footer">
            <MDBCol>
                <Footer />
            </MDBCol>
        </MDBRow>
        </MDBContainer>
    </div>
);
}

export default App

and MenuBar.js

import { React, Component  } from 'react';
import {
  MDBNavbar, MDBNavbarBrand, MDBNavbarNav, MDBNavItem, MDBNavLink,             MDBNavbarToggler, MDBCollapse, MDBFormInline,  MDBDropdown, MDBDropdownToggle, MDBDropdownMenu, MDBDropdownItem
} from "mdbreact";

import "../topBar.scss";
import "../index.scss";
// import ModalWindow from "./Modal";

class MenuBar extends Component {
  state = {
    isOpen: false
  };

  toggleCollapse = () => {
    this.setState({ isOpen: !this.state.isOpen });
  }

  render() {
    return (
      <MDBNavbar color="indigo" dark expand="md">
        <MDBNavbarBrand>
          <strong className="white-text">Navbar</strong>
        </MDBNavbarBrand>
        <MDBNavbarToggler onClick={this.toggleCollapse} />
        <MDBCollapse id="navbarCollapse3" isOpen={this.state.isOpen} navbar>
          <MDBNavbarNav left>
            <MDBNavItem active>
              <MDBNavLink to="#!">Home</MDBNavLink>
            </MDBNavItem>
            <MDBNavItem>
              <MDBNavLink to="#!">Features</MDBNavLink>
            </MDBNavItem>
            <MDBNavItem>
              <MDBNavLink to="#!">Pricing</MDBNavLink>
            </MDBNavItem>
            <MDBNavItem>
              <MDBDropdown>
                <MDBDropdownToggle nav caret>
                  <span className="mr-2">Dropdown</span>
                </MDBDropdownToggle>
                <MDBDropdownMenu>
                  <MDBDropdownItem href="#!">Action</MDBDropdownItem>
                  <MDBDropdownItem href="#!">Another Action</MDBDropdownItem>
                  <MDBDropdownItem href="#!">Something else here</MDBDropdownItem>
                  <MDBDropdownItem href="#!">Something else here</MDBDropdownItem>
                </MDBDropdownMenu>
              </MDBDropdown>
            </MDBNavItem>
          </MDBNavbarNav>
          <MDBNavbarNav right>
            <MDBNavItem>
          <MDBFormInline waves>
            <div className="md-form my-0">
              <input className="form-control mr-sm-2" type="text" placeholder="Search" aria-label="Search" />
            </div>
          </MDBFormInline>
        </MDBNavItem>
      </MDBNavbarNav>
    </MDBCollapse>
  </MDBNavbar>
);
  }
}

export default MenuBar