Internet Explorer 11 has problems showing the icons of bootstrap. With Opera, Firefox and Chrome it works perfectly, and it also works with Edge but the icons are not shown with IE in Edge mode or (10,9,8). Before I changed the website to https it worked all fine. I have this problem after changing it to ssl.
Does anyone know what I can do in order to solve this problem (at Server - Microsoft Azure or at load balancer)?
With IE (icons are not shown):
With Firefox: