Following error is displayed in Horde login screan using Microsoft Internet Explorer 11:
You are using an old, unsupported version of Internet Explorer. You need at least Internet Explorer 8. If you already run IE8 or higher, disable the Compatibility View. Minimal view will be used until you upgrade your browser.
'Compatibility mode' is switched on in Microsoft Internet Explorer 11
Switch off compatibility mode as described in the documentation.
- Restart the browser.