LiveTiles does not support IE10 or IE11 running in IE10 compatibility mode. Some features within the product, such as the Rich content tile creation have limited functionality within these modes. As such we recommend against using these browsers.
However, if you still need to use IE11 to create pages, you will need to modify the Seattle Master page to remove compatibility mode. In order to do this, you will need Site admin access to the site collection's master page you would like to edit.
You will then need to go to the site settings and under master pages download Seattle.master. Once opened you will need to delete the following line:
Once this has saved, reupload this file back into master pages. Compatibility will not be forced.