I've found threads from 2014 about this issue that were never resolved. AVAST is notorious for having lacking support, if any, for their business products (The free product has 24/7 phone support but the business product can't even get a competent response in under 1 week...sigh...)
ANYWAY,
Same issue here. Server 2012 R2 Essentials with AVAST SOA Program Version: 1.3.3.42, Database version: 1450 IE Enhanced Security was already off for admins, but we toggled it off for EVERYONE, then back on, then off again, all the while checking the console but it had zero effect. We've added the local IP as a "trusted" site, tried lowering all security settings in I.E., even tried resets of the settings but literally NO DIFFERENCE no matter what we try. I even uninstalled Silverlight, downloaded a fresh copy via Microsoft, installed that and re-tested but no luck.
Console loads fine on Windows 7 computers running Internet Explorer 11 (Same version server has). When trying to access it on the server, weather it be by Hostname, IP or using localhost:port, it's just a blank page. The title bar actually changes to "avast! Small Office Adminis..." so you think it's going to work... but it never does. Eventually if you wait long enough the title changes and the page reads the generic "Page cannot be displayed".
There's no default chrome support as it uses Silverlight. I personally use Chrome with IE Tab addin for other silverlight websites, which usually works fine, but even that has the same issue where the title loads but a blank page otherwise.
This is happening in a small, windows-based environment, about 10 workstations total, but we have other clients/environments on server 2012 that don't have the issue. It seems to be isolated to server 2012 essentials, but I'm just guessing on that part.
I do believe this should be enough information to merit a response from a tech... however in the past I've done this and simply gotten no response because no one knows the answer. I'm optimistic!