Center ali

Hello!I used Intro, and in IE i have a problem. This block  in Internet Explorer on monitor 768+ aligned right. How can i fix it?

<!--Grid column--><div class="col-md-12 mb-4 white-text mr-auto text-center "><h1 class="h1-reponsive white-text text-uppercase font-weight-bold mb-0 pt-md-5 pt-5 center-block wow fadeInDown animated" data-wow-delay="0.3s" style="visibility: visible; animation-name: fadeInDown; animation-delay: 0.3s;"><strong>.................</strong></h1><hr class="hr-light my-4 wow fadeInDown animated" data-wow-delay="0.4s" style="visibility: visible; animation-name: fadeInDown; animation-delay: 0.4s;"><h5 class="text-uppercase mb-4 center-block white-text wow fadeInDown animated" data-wow-delay="0.4s" style="visibility: visible; animation-name: fadeInDown; animation-delay: 0.4s;"><strong>................</strong></h5><div style="text-align: center;"><a class="btn btn-outline-white text-center wow fadeInDown waves-effect waves-light animated" data-wow-delay="0.4s" onclick="javascript: ShowWebForm(2);" style="text-align: center; visibility: visible; animation-name: fadeInDown; animation-delay: 0.4s;">...................</a></div></div><!--Grid column-->