WHAT

In Internet Explorer some fields or functions are not working or are rendered incorrectly. The error usually shows after upgrading to the latest Pronestor Room or Pronestor Display for on-premise installations.

HOW

The fix was to add a HTTP Response header to the web site with the following parameters:

Name:  X-UA-Compatible

Value: IE=edge

WHY

When installing Pronestor products on-premise, newer version of IE renders local sites in compatibility mode. This can either be override via the fix above, or by adding the Pronestor server to a trusted zone.