Does not load the DatePicker calendar

The question is very simple. I have everything included correctly, but the date selector simply does not appear on my form. This is the date selector code

<div class="form-group">
                <label>Fecha de Nacimiento</label>
                <div class="input-group date">
                  <div class="input-group-addon">
                    <i class="fa fa-calendar"></i>
                  </div>
                  <input type="text" class="form-control pull-right" id="datepicker">
                </div>
                <!-- /.input group -->
              </div>

And that's it. There is no date selector or anything in that text entry. There is also no error. I'm using AdminLTE , Angular 6 and Bootstrap4