Once after installing/upgrading BizTalk360, you may face a problem like the icons are not displaying in IE. So that you cannot navigate to other BizTalk360 pages.
First, we want to confirm if its the problem with BizTalk360 website alone or it is a generic one. To check, open the website which contains icons.
Say for example: Font awesome website which contains huge number of icons http://fontawesome.io/icons/
If you face the same problem like icons are not displaying on the website we can confirm that it is a general problem and it is a permission issue which is specific to IE. Kindly enable the settings under IE browser
Once after enabling the settings and saving, please close and open the browser again.