Session Doesn't Work on Redirect

• //Import session facade
  use Illuminate\Support\Facades\Session;
  
  //Controller's method
  if(!$condition){
      Session::flash('message', 'Error message !');
      Session::flash('alert-class', 'alert-danger');
      return redirect()->back();
  }
  Session::flash('message', 'Success message !');
  Session::flash('alert-class', 'alert-success');
  return redirect()->back();
  
  //Blade view 
  @if(Session::has('message'))
  <div class="alert {{ Session::get('alert-class', 'alert-info') }} alert-dismissible fade show">
      {{ Session::get('message') }}
      <button type="button" class="close" data-dismiss="alert" aria-label="Close">
          <span aria-hidden="true">&times;</span>
      </button>
  </div>
  @endif
  

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